Can't send PM anymore


I get this when I try to send a PM. (error shows right after clicking send/submit).

Hey, that image broke, can you tell me more about what the error says?

EDIT: Looks like I can see the /50x error now. I’ve emailed our online team about this.

Sorry for late reply.
This randomly happened.
I haven’t tried PMing more people now to see if it’s fixed or not.

I have the same error (’/50x’) when I want to create a new thread with more than one tag. It happens right after clicking Submit New Thread.