I'm running a 1.15.2 dedicated server and forge 31.2.31.

When I updated Productive Bees to 0.3.0 the server would still load - however clients attempting to join world would permanently hang trying to load in. Unfortunately there is no relevant log information I could see that would be helpful. Reverting to the previous version available to 1.15.2 resulted in clients successfully logging in.

Thank you for reporting. Do you still have the server log from when the clients could not log in?

I've uploaded a hotfix 0.3.1, can you check if that solves your issue?

0.3.2 has more fixes which should let the clients connect now.

The 0.3.2 patch seems to fix the issues - i see there was another thread here that got addressed the same thing. We'd had difficulty logging into the modpack previous to the breaking update here and now login goes through 100% of time - so was something from this mod previously most likely also. Thanks for clearing up the issues so far!