site feedback - Puzzles Locks Up

Sort:
Whatsnu
My entries are blocked.
Whatsnu
Puzzles locks up. How can I submit a screenshot of error message?
Whatsnu
The operation couldn't be completed. (ChessProtoDefi-nitions. TwirpError error 3.)

-- In a black box. Often if you get past this the system gives you the same puzzle again, but it plays through correctly.
Whatsnu
More completely, the error box reads:
The operation couldn't be completed. (ChessProtoDefi-nitions. TwirpError error 3.)
Cancel | Try Again

This happens often. Why?