Server not starting when Oxide is installedFixed
Same problem here
For those having issues, please verify the OS you are on (Linux or Windows), paste (pastebin.com) your FULL output_log.txt file (or where -logfile is set to), and make sure you are running no third-party extensions such as Rust:IO or RustEdit.
Same here. Server startup looks like usual but just after "Server startup complete" it says "EasyAntiCheat Scout Shutting Down" and "[Raknet] Server Shutting Down (Shutting Down)".

/etc/lsb-release:
DISTRIB_ID=UbuntuDISTRIB_RELEASE=18.04DISTRIB_CODENAME=bionicDISTRIB_DESCRIPTION="Ubuntu 18.04.3 LTS"​
Kernel: Linux friday 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 16:55:30 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Note: No RustIO or RustEdit ever installed. All plugins removed.

Full log: https://paste.ubuntu.com/p/MBGMwQJBCS/

End of log:

Map Spawned 847 entitiesCouldn't load server/rustserver/proceduralmap.3500.41.184.sav - file doesn't exist(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Missing EnvSync - creating(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Missing CommunityEntity - creating(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Missing ResourceDepositManager - creating(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Missing RelationshipManager - creating(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Missing TreeManager - creating(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Initializing 25923 entity links done.Initializing 281 stability supports done.Initializing 19004 entity save caches done.Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/steam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/steam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libsteam_api64Couldn't initialize Steam Server (steam_api64)(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)IP address from external API: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)Server startup completeEasyAntiCheat Scout Shutting Down(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)EasyAntiCheat Server Shutting Down(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)[Raknet] Server Shutting Down (Shutting Down)Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libKernel32Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libKernel32.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/Kernel32Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libKernel32Fallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libKernel32.soFallback handler could not load library /home/rustserver/serverfiles/RustDedicated_Data/Mono/libKernel32Setting up 4 worker threads for Enlighten. Thread -> id: 7f9ec12f3700 -> priority: 1 Thread -> id: 7f9ec02f1700 -> priority: 1 Thread -> id: 7f9edcb4f700 -> priority: 1 Thread -> id: 7f9ec0af2700 -> priority: 1eac_server.so [x64] :: OnUnload()​
Full start up now but restarts back to back, wont update.

When i thought it would start before it would but then just shut down.
It's starting loading as before the update, then shutting down.

Update still errors out wotn allow it to recieve the update.
Same here:
Exception: Failed to initialize the native module!
  at EasyAntiCheat.Server.Hydra.EasyAntiCheatServer`1[TClient]..ctor (EasyAntiCheat.Server.Hydra.EasyAntiCheatServer`1+ClientStatusHandler[TClient] clientStatusHandler, EasyAntiCheat.Server.
ServerConfiguration serverConfiguration, System.Nullable`1[T] gameID) [0x0008a] in <465abc028c31478f8f53797793cf394e>:0
  at EasyAntiCheat.Server.Hydra.EasyAntiCheatServer`1[TClient]..ctor (EasyAntiCheat.Server.Hydra.EasyAntiCheatServer`1+ClientStatusHandler[TClient] clientStatusHandler, System.Int32 register
Timeout, System.String serverName) [0x00009] in <465abc028c31478f8f53797793cf394e>:0
  at EACServer.DoStartup () [0x0004f] in <1609b3f6845949a792b0a37328e52bba>:0
  at ServerMgr.OpenConnection () [0x00075] in <1609b3f6845949a792b0a37328e52bba>:0
  at Bootstrap+<StartServer>d__19.MoveNext () [0x002c8] in <1609b3f6845949a792b0a37328e52bba>:0
  at UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) [0x00027] in <5efc91990d9549c2a2cf3874065a5193>:0

[Raknet] Server Shutting Down (Shutting Down)
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/libKernel32
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/libKernel32.so
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/Kernel32
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/libKernel32
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/libKernel32.so
Fallback handler could not load library /home/steam/rust/server/RustDedicated_Data/Mono/libKernel32
Steamworks Shutting Down​
all in the title
i'm using gameserverkings.com
have the same problem here

Also Debian GNU/Linux 9 (stretch)

Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/steam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/steam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libsteam_api64
Couldn't initialize Steam Server (steam_api64)
[Raknet] Server Shutting Down (Shutting Down)
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libKernel32
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libKernel32.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/Kernel32
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libKernel32
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libKernel32.so
Fallback handler could not load library /home/*/serverfiles/RustDedicated_Data/Mono/libKernel32
Setting up 4 worker threads for Enlighten.
Thread -> id: 7f1b887be700 -> priority: 1
Thread -> id: 7f1b877bc700 -> priority: 1
Thread -> id: 7f1b87fbd700 -> priority: 1
Thread -> id: 7f1ba646f700 -> priority: 1
eac_server.so [x64] :: OnUnload()

no, it's in modded, but oxide doesn't work

And I'm not on linux.......

windows 10

it seems only linux servers are affected.
Just truing to update all once more and then will try run on linux without Oxide
Clean server without uMOD starts normal (debian 9.9), 
Locked automatically