Failed to call hook 'OnServerSave' on plugin 'StaticLootables v2.10.0'

03/13 02:13:37 | Failed to call hook 'OnServerSave' on plugin 'StaticLootables v2.10.0' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.StaticLootables.SaveContainer () [0x00038] in <c7f1306a5af44611b6ea830295ff4b24>:0
at Oxide.Plugins.StaticLootables.OnServerSave () [0x00000] in <c7f1306a5af44611b6ea830295ff4b24>:0
at Oxide.Plugins.StaticLootables.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002c1] in <c7f1306a5af44611b6ea830295ff4b24>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9c80d821d00a44c9a24497c73ad2d20d>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d646191a355d43a6b3ab36b7ee14c740>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d646191a355d43a6b3ab36b7ee14c740>:0

also noted ImageLibrary throwing errors on start up as well. Not sure if this may be the root cause or a separate issue. Posted in uMod/Oxide discord:

03/13 02:14:13 | Web request callback raised an exception (JsonReaderException: Unexpected character encountered while parsing value: T. Path '', line 0, position 0.)
at Newtonsoft.Json.JsonTextReader.ParseValue () [0x002b3] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonTextReader.Read () [0x0004c] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.JsonReader.ReadAndMoveToContent () [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonContract contract, System.Boolean hasConverter) [0x00043] 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 Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in <271c58b7a8684db5a2c92be17a81f252>:0
at Oxide.Plugins.ImageLibrary.<LoadInbuiltSkinLookup>b__25_0 (System.Int32 code, System.String response) [0x00000] in <c7f1306a5af44611b6ea830295ff4b24>:0
at Oxide.Core.Libraries.WebRequests+WebRequest.<OnComplete>b__42_0 () [0x00034] in <d646191a355d43a6b3ab36b7ee14c740>:0

Similar issue today on server start ad on restarts, is showing this:

Failed to call hook 'OnServerSave' on plugin 'StaticLootables v2.10.4' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.StaticLootables.SaveContainer () [0x00038] in <e35eb495e341490babe6784af7e4e6b6>:0
at Oxide.Plugins.StaticLootables.OnServerSave () [0x00000] in <e35eb495e341490babe6784af7e4e6b6>:0
at Oxide.Plugins.StaticLootables.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002c1] in <e35eb495e341490babe6784af7e4e6b6>: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 <112d89ea5d3348c8b949af0ab1a866d2>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0

i got the same thing worked fine then server restarted then that error pop up 

Failed to call hook 'OnServerInitialized' on plugin 'StaticLootables v2.10.4' (NotImplementedException: Unknown wire type: 6)
  at SilentOrbit.ProtocolBuffers.ProtocolParser.SkipKey (BufferStream stream, SilentOrbit.ProtocolBuffers.Key key) [0x0006b] in <e9d38ad04d6d4340a0fd7bd2ab7f2850>:0
  at ProtoBuf.Entity.Deserialize (BufferStream stream, ProtoBuf.Entity instance, System.Boolean isDelta) [0x02b83] in <e9d38ad04d6d4340a0fd7bd2ab7f2850>:0
  at ProtoBuf.Entity.Deserialize (System.Byte[] buffer) [0x00013] in <e9d38ad04d6d4340a0fd7bd2ab7f2850>:0
  at Oxide.Plugins.StaticLootables.LoadContainer () [0x00060] in <521af0a2244a4c6fa657c7a1838a6188>:0
  at Oxide.Plugins.StaticLootables.OnServerInitialized () [0x00029] in <521af0a2244a4c6fa657c7a1838a6188>:0
  at Oxide.Plugins.StaticLootables.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0029b] in <521af0a2244a4c6fa657c7a1838a6188>: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 <112d89ea5d3348c8b949af0ab1a866d2>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0