@nhl.pl It seems to be working now. I can't believe something so simple could break it. Thanks for your help!
Thanks for letting me know.
Edit: When can we see nhl.pl on NodeBB
ahwayakchih already signed NodeBB Individual Contributor Assignment Agreement so hopefully by the end of the month we will try to migrate from IP.Board to NodeBB. We're moving it from old server to the new one so all other things have to be updated.
We're waiting for NodeBB 0.7 to be released and for UTF8 Converter in already great nodebb-plugin-import tool.