[MarkFL]

Originally Posted by Wisc

so id server issue or I should try to
refresh the blocks
clear the cache

and do again?

Thank you for your hard work...
I think will be helpful for a lot of people

It sounds like a server issue to me, from the brief amount I read about it online. As such, it is outside my relatively diminutive areas of expertise, so I don't know what to tell you to try to resolve the issue. Hopefully someone else here can offer some suggestions.

What I suggest doing is creating a new thread, where the title indicates you are getting a 406 error when trying to save a forum block, and this will be more likely to get you some help rather than to trust that someone who knows how to fix it will stumble across this thread.