Error Message - Specified cast is not valid

I use the feature “Stop ConfigMgr Client Activities” and after the confirmation i get this error:
RCT version 4.1.2002.3003

The function works, the ccmexec service was stopped but i think the message should not appear.
I tried with version 4.1.2001.3101 and got the same error message.

Thanks for reporting the issue. I’ve added it to the backlog and we’ll post here when it’s fixed.

This is rather long in coming, but this bug has been fixed (for a while now)