I am getting following error.
A technical problem with the server created an error. Try again to continue what you were doing. If the problem persists, try again later.
Everywhere in my backend. I tried to recompile, flush cache and so on, nothing helps. Logs are empty, so no idea whats going on.
I watch the requests and figured that the call which causes the error looks like this:
Not sure if this helps any further. Anyone any ideas what might be wrong and how to fix that? I am running 2.2.3.