Error for reactivating instance

OS Name/Version: Windows 10

Product Name/Version:

Problem Description:


I have a problem with my AMP instance (minecraft).
Today, the instance was OFF, I tried to restart it but I have this message in the logs file:

[12:27:01] [GSMyAdmin Error]      : No valid AMP licence was found. Please run `ampinstmgr reactivate NexusCraft` to reactivate this instance.

I opened the command prompt to try to reactivate the instance but I have this error message :

[Info] Checking licence key...
←[0m[Info] Licence Type:  McMyAdmin Professional
←[0m[Info] Current Usage: 0
←[0m[Info] Reactivating instance NexusCraft...
←[0m←[1m[Error] IM was unable to execute the requested command.
←[0m←[1m[Error] MissingMethodException
←[0m←[1m[Error] [0] (MissingMethodException) : Méthode introuvable : 'System.Threading.Tasks.Task`1<Int32> ModuleShared.Utilities.RunUtilityAsync(System.String, System.String, System.String, System.String, Boolean, System.Collections.Generic.IDictionary`2<System.String,System.String>)'.
←[0m←[1m[Error]    à InstanceManagerPlugin.LocalInstanceManager.<ConfigureAMP>()
   à InstanceManagerPlugin.LocalInstanceManager.ConfigureAMP(AMPInstanceBase Spec, Dictionary`2 Args, RunningTask Task)
   à InstanceManagerPlugin.LocalInstanceManager.<ReconfigureInstance>()
   à InstanceManagerCLI.Core.<ReactivateInstance>()
   à InstanceManagerCLI.Core.ExecuteCommand(List`1 Params, Dictionary`2 Args)

Has someone already had this problem ?
Thanx !

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