Minecraft Griefergames what's going on?

Since today I can't open any more boxes, read books, what to take from the Inv and so, without which I will be flown out. Then there's such a warning. Write and that's how it works. -.-

What can I do?

The whole thing actually sounds like your description, after a network problem.

Since the MC Chat Asyncron runs to the game and this needs little power, I'm not surprised that this still works.

What kind of warning do you receive?