I have this exact same problem and nobody has given me any info. All they do say is check ports, well they’re all correct. I find it strange that people with multiple servers haven’t mentioned this issue. I’m the same the moment I travel to another tile which can be built on and claimed also the level block is removed, I can’t then rejoin and I get a query port error message. My ports numbers are at least 5 apart which some people have recommended. Yet still nothing. Are all these people playing servers which are all home servers???