UnetWeaver Error : Exeption

Hi guys i really need some help since the last update i got this error :

UNetWeaver error: Exception :System.ArgumentNullException: Argument cannot be null.
Parameter name: method
at Mono.Cecil.Cil.Instruction.Create (OpCode opcode, Mono.Cecil.MethodReference method) [0x00000] in <filename unknown>:0
at Mono.Cecil.Cil.ILProcessor.Create (OpCode opcode, Mono.Cecil.MethodReference method) [0x00000] in <filename unknown>:0
at Unity.UNetWeaver.NetworkBehaviourProcessor.ProcessCommandCall...

UnetWeaver Error : Exeption