after the update rust plugins stopped loading, everything, while oxide works

You'd need to check your oxide/logs for errors. There was nothing changed with Ofide in the updates and nothing that would cause all plugins to not compile.

and how to check them?

Go to the oxide/logs folder, open the oxide_*.txt file in text editor, and look over them for errors.

07:51 [Info] Loading Oxide Core v2.0.3867...
07:51 [Info] Loading extensions...
07:51 [Info] Latest compiler MD5: 5fbca0bf39b1c09ddf2fb3686b869242
07:51 [Info] Local compiler MD5: 5fbca0bf39b1c09ddf2fb3686b869242
07:51 [Info] Loaded extension CSharp v2.0.4000 by Oxide and Contributors
07:51 [Info] Loaded extension MySql v2.0.3755 by Oxide and Contributors
07:51 [Info] Loaded extension Rust v2.0.4260 by Oxide and Contributors
07:51 [Info] Loaded extension SQLite v2.0.3754 by Oxide and Contributors
07:51 [Info] Loaded extension Unity v2.0.3756 by Oxide and Contributors
07:51 [Info] Using Covalence provider for game 'Rust'
07:51 [Info] Loading plugins...
07:51 [Info] Loaded plugin Rust v2.0.4260 by Oxide and Contributors
07:51 [Info] Loaded plugin Unity v2.0.3756 by Oxide and Contributors
07:51 [Error] AutomatedSearchlights plugin requires missing dependency: RustNET
07:51 [Error] Plugin filename Backpack (1.0.3).cs must match the main class Backpack (should be Backpack.cs)
07:51 [Error] BountyNET plugin requires missing dependency: RustNET
07:51 [Info] Added '// Reference: UnityEngine.VehiclesModule' in plugin 'CarCommander'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'GatherMultiplier'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'HitMarker (1)'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'HitMarker'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'PlayersClasses'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'RandomCases (1)'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'RandomCases'
07:51 [Error] RemoteTurrets plugin requires missing dependency: RustNET
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'RustMap'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'TrophySigns'
07:51 [Info] Added '// Reference: System.Drawing' in plugin 'WipeDetection'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Unable to resolve script error to plugin: RustMap (2).cs(4,255+): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: BuriedTreasure.cs(17,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `BuriedTreasure'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: CarCommander.cs(21,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `CarCommander'
07:51 [Error] Error while compiling:
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07:51 [Warning] [DEBUG] Plugin compilation is already queued: ClansUI (12.312 ago)
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: CustomRespawn.cs(480,34): error CS1525: Unexpected symbol `Plugin', expecting `class', `delegate', `enum', `interface', `partial', or `struct'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: FoundationDrop.cs(23,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `FoundationDrop'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: Friends.cs(16,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Friends'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: HitMarker.cs(20,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `HitMarker'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: Kits.cs(17,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Kits'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: LockOnRockets.cs(13,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `LockOnRockets'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: Menu.cs(18,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Menu'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: NoEscape.cs(16,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `NoEscape'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: OreBonus.cs(13,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `OreBonus'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: RandomCases.cs(23,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RandomCases'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: RatesController.cs(24,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RatesController'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: Remove.cs(19,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Remove'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling: RustMap.cs(25,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: TsunHorse.cs(19,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `TsunHorse'
07:51 [Error] Error while compiling:
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07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling: ZenPanel.cs(23,8): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `ZenPanel'
07:51 [Error] Error while compiling:
07:51 [Error] Error while compiling:
08:05 [Info] Oxide.Rust Version: 2.0.4260
08:06 [Info] IP address from external API: 178.71.238.149
08:06 [Info] Listing 186 plugins:
01 AdminMenu - Failed to compile:
02 AFKChecker - Failed to compile:
03 AlertHelper - Failed to compile:
04 AllLogs - Failed to compile:
05 AlphaLoot - Failed to compile:
06 AntiHack - Failed to compile:
07 AProtection - Failed to compile:
08 AutoCodeLock - Failed to compile:
09 AutoDoorCloser - Failed to compile:
10 AutomatedSearchlights - Unloaded
11 Backpack (1.0.3) - Unloaded
12 Backpack - Failed to compile:
13 BanGun - Failed to compile:
14 BaseProtector - Failed to compile:
15 BBank - Failed to compile:
16 BestLoot - Failed to compile:
17 BountyNET - Unloaded
18 BPUnlockerVip - Failed to compile:
19 BuildingBlocked - Failed to compile:
20 BuildingUpgrade - Failed to compile:
21 BuriedTreasure (1) - Failed to compile:
22 BuriedTreasure - Failed to compile: BuriedTreasure.cs(17,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `BuriedTreasure'
23 CarCommander (1) - Failed to compile:
24 CarCommander - Failed to compile: CarCommander.cs(21,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `CarCommander'
25 Cases - Failed to compile:
26 CCases - Failed to compile:
27 ChatPlus - Failed to compile:
28 ChatSystem - Failed to compile:
29 Clans - Failed to compile:
30 ClansUI - Failed to compile:
31 CleverEvent - Failed to compile:
32 CovertAdmin - Failed to compile:
33 Crafter - Failed to compile:
34 CraftQuarry - Failed to compile:
35 CupboardGUI - Failed to compile:
36 CustomDrop - Failed to compile:
37 CustomDropChanger - Failed to compile:
38 CustomMenu - Failed to compile:
39 CustomMessages - Failed to compile:
40 CustomRespawn - Failed to compile: CustomRespawn.cs(480,34): error CS1525: Unexpected symbol `Plugin', expecting `class', `delegate', `enum', `interface', `partial', or `struct'
41 CustomTownVending - Failed to compile:
42 CustomWound - Failed to compile:
43 DailyReward - Failed to compile:
44 DeathMarker - Failed to compile:
45 DeathMessages - Failed to compile:
46 DeathStats - Failed to compile:
47 DrawBridges - Failed to compile:
48 Duel - Failed to compile:
49 EnchantedCup - Failed to compile:
50 EventsCore - Failed to compile:
51 EvoCop (1) - Failed to compile:
52 EvoSorting - Failed to compile:
53 F1Spawn - Failed to compile:
54 FireSword - Failed to compile:
55 FoundationDrop (1) - Failed to compile:
56 FoundationDrop - Failed to compile: FoundationDrop.cs(23,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `FoundationDrop'
57 Friends (1) - Failed to compile:
58 Friends - Failed to compile: Friends.cs(16,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Friends'
59 FriendsUI - Failed to compile:
60 FurnaceSorter - Failed to compile:
61 GatherMultiplier - Failed to compile:
62 Ghoulish - Failed to compile:
63 Gold - Failed to compile:
64 GradeDestroy - Failed to compile:
65 HeliSupport - Failed to compile:
66 HelpGUI - Failed to compile:
67 HitAdvance - Failed to compile:
68 HitMarker (1) - Failed to compile:
69 HitMarker - Failed to compile: HitMarker.cs(20,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `HitMarker'
70 HomeRecycler - Failed to compile:
71 HomesGUI - Failed to compile:
72 Idea - Failed to compile:
73 InfoPanel - Failed to compile:
74 InfoPlus - Failed to compile:
75 InitName - Failed to compile:
76 Kits (1) - Failed to compile:
77 Kits - Failed to compile: Kits.cs(17,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Kits'
78 KitsUI - Failed to compile:
79 LadderModes - Failed to compile:
80 LicenseCheck - Failed to compile:
81 LockOnRockets (1) - Failed to compile:
82 LockOnRockets - Failed to compile: LockOnRockets.cs(13,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `LockOnRockets'
83 Logo - Failed to compile:
84 MagicTools - Failed to compile:
85 MapGenerator - Failed to compile:
86 MathEvent - Failed to compile:
87 MathPlus - Failed to compile:
88 MathQuiz - Failed to compile:
89 Menu (1) - Failed to compile:
90 Menu - Failed to compile: Menu.cs(18,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Menu'
91 MenuHelp - Failed to compile:
92 MeteorFall - Failed to compile:
93 MiniCopter - Failed to compile:
94 MiniPanel - Failed to compile:
95 MurderSeries - Failed to compile:
96 NControl - Failed to compile:
97 NeonSkins - Failed to compile:
98 NickHistory - Failed to compile:
99 NoDud - Failed to compile:
100 NoEscape (1) - Failed to compile:
101 NoEscape - Failed to compile: NoEscape.cs(16,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `NoEscape'
102 OilCrate - Failed to compile:
103 OreBonus (1) - Failed to compile:
104 OreBonus - Failed to compile: OreBonus.cs(13,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `OreBonus'
105 Panel - Failed to compile:
106 PilotEject - Failed to compile:
107 PlaneCrash - Failed to compile:
108 PlayerACP - Failed to compile:
109 PlayerGifts - Failed to compile:
110 PlayersClasses - Failed to compile:
111 PlayerSkins - Failed to compile:
112 PlayerStats - Failed to compile:
113 PPeace - Failed to compile:
114 Quests - Failed to compile:
115 QuickRecycler - Failed to compile:
116 RadHouse - Failed to compile:
117 RadHouse120 - Failed to compile:
118 RadStorm - Failed to compile:
119 Raft - Failed to compile:
120 RaidProtector - Failed to compile:
121 RandomCases (1) - Failed to compile:
122 RandomCases - Failed to compile: RandomCases.cs(23,18): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RandomCases'
123 RandomSpawns - Failed to compile:
124 RatesController (1) - Failed to compile:
125 RatesController - Failed to compile: RatesController.cs(24,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RatesController'
126 RemoteTurrets - Unloaded
127 Remove (1) - Failed to compile:
128 Remove - Failed to compile: Remove.cs(19,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `Remove'
129 ReportVK - Failed to compile:
130 RestartGUI - Failed to compile:
131 RInstantSmelt - Failed to compile:
132 RocketTurrets - Failed to compile:
133 RulesGUI - Failed to compile:
134 RustMap (1) - Failed to compile:
135 RustMap (2) - Failed to compile:
136 RustMap - Failed to compile: RustMap.cs(25,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `RustMap'
137 RustShop - Failed to compile:
138 RustStats - Failed to compile:
139 RustTanic - Failed to compile:
140 SBagsManager - Failed to compile:
141 ScientistLoot - Failed to compile:
142 SharkBait - Failed to compile:
143 ShipControl - Failed to compile:
144 Skills - Failed to compile:
145 SkinBox - Failed to compile:
146 SkinChanger - Failed to compile:
147 SkipNight - Failed to compile:
148 Skyfall - Failed to compile:
149 SlidingDoors - Failed to compile:
150 SortItems - Failed to compile:
151 SpawnControl - Failed to compile:
152 SQLStatistics - Failed to compile:
153 Stacks - Failed to compile:
154 StalkerLite - Failed to compile:
155 StoreBonus - Failed to compile:
156 StoreHandler - Failed to compile:
157 SwapCoins (1) - Failed to compile:
158 TeamGuard - Failed to compile:
159 Teams - Failed to compile:
160 TeamsChat - Failed to compile:
161 Teleportation - Failed to compile:
162 TeleportGUI - Failed to compile:
163 TimedItemsBlocker - Failed to compile:
164 TimedPermissions - Failed to compile:
165 TimedPermUIMySQL - Failed to compile:
166 Tipster - Failed to compile:
167 Top - Failed to compile:
168 Trade - Failed to compile:
169 TreasureBox - Failed to compile:
170 TrophySigns - Failed to compile:
171 TsunHorse (1) - Failed to compile:
172 TsunHorse - Failed to compile: TsunHorse.cs(19,11): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `TsunHorse'
173 UberTool - Failed to compile:
174 UIConnect - Failed to compile:
175 UniversalShop - Failed to compile:
176 UpLifted - Failed to compile:
177 Vanish - Failed to compile:
178 VehiclesExt - Failed to compile:
179 VikingBoat - Failed to compile:
180 VoteDay - Failed to compile:
181 WipeBlock - Failed to compile:
182 WipeDetection - Failed to compile:
183 ZenPanel (1) - Failed to compile:
184 ZenPanel - Failed to compile: ZenPanel.cs(23,8): error CS0101: The namespace `Oxide.Plugins' already contains a definition for `ZenPanel'
185 ZombieHorde - Failed to compile:
186 ZoneInfoGUI - Failed to compile:

Your plugins are not compiling as you have a lot of duplicate named plugins and those with invalid names with (1) and such in them. Remove the duplicates, fix the invalid names, all should be good.

thank you