00:25 [Error] Failed to initialize plugin 'ServerRewards v2.0.4' (JsonReaderException: Unterminated string. Expected delimiter: ". Path '6519326', line 85759, position 3.)
at Newtonsoft.Json.JsonTextReader.ReadStringIntoBuffer (System.Char quote) [0x00099] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonTextReader.ParseProperty () [0x0002e] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonTextReader.ParseObject () [0x000d8] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonTextReader.Read () [0x00053] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary (System.Collections.IDictionary dictionary, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonDictionaryContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, System.String id) [0x0028b] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x002a8] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000d9] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00053] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0
at Oxide.Plugins.ServerRewards+Datafile`1[T].Load () [0x00032] in <e87570101054455facd8a7905950e2a1>:0
at Oxide.Plugins.ServerRewards+Datafile`1[T]..ctor (System.String name, Newtonsoft.Json.JsonConverter[] converters) [0x0007f] in <e87570101054455facd8a7905950e2a1>:0
at Oxide.Plugins.ServerRewards.LoadData () [0x0000b] in <e87570101054455facd8a7905950e2a1>:0
at Oxide.Plugins.ServerRewards.Loaded () [0x00000] in <e87570101054455facd8a7905950e2a1>:0
at Oxide.Plugins.ServerRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0009c] in <e87570101054455facd8a7905950e2a1>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d59b507fd76240e5b62228d0eae39b73>:0
at Oxide.Plugins.CSharpPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x000cf] in <42f9bedc659b4f4786eb778d3cd58968>:0

This happened immediately after the 08/07/2025 patch, and new server rewards update?

one of your data files is invalid, not sure which one but its got atleast 85759 lines and contains '6519326' so you should be able to narrow it down based on that. once you find it you can either unload the plugin and delete it, or run it through a json validator such as jsonlint and find/fix the issue