The get the error -The request failed. Response content

While I use the connector ‘when the status of the envelope changes’ it throws this error when i use it in the power automate flow.

please find the error message below: 

The request failed. Response content: '{"error":{"message":"Value cannot be null. (Parameter 'source')","stackTrace":["at Void ThrowArgumentNullException(System.Linq.ExceptionArgument) : Line 0","at Boolean Contains[TSource](System.Collections.Generic.IEnumerable`1[TSource], TSource, System.Collections.Generic.IEqualityComparer`1[TSource]) : Line 0","at Boolean Contains[TSource](System.Collections.Generic.IEnumerable`1[TSource], TSource) : Line 0","at Void MoveNext() : Line 0","at Void Throw() : Line 0","at Void ThrowForNonSuccess(System.Threading.Tasks.Task) : Line 0","at Void HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) : Line 0","at Void GetResult() : Line 0","at Void MoveNext() : Line 0","at Void Throw() : Line 0","at Void ThrowForNonSuccess(System.Threading.Tasks.Task) : Line 0","at Void HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) : Line 0","at TResult GetResult() : Line 0","at Void MoveNext() : Line 0"]}}'.