Hi,
I am running a session on mturk right now, and just got an error.

ClientError
An error occurred (ValidationException) when calling the AssociateQualificationWithWorker operation: 1 validation error detected: Value 'd2a6pEAACZr7xb' at 'workerId' failed to satisfy constraint: Member must satisfy regular expression pattern: ^A[A-Z0-9]+$

Does it mean this worker was blocked?

Thanks,
Jasmine