Crash on server join


I’m currently using SpongeForge 8.1.0 (1.16.5-36.2.5-8.1.0-RC1153-universal) in my Minecraft server, and everytime I try to connect, it keeps throwing this exception: net.minecraft.crash.ReportedException: Ticking player at net.minecraft. -

I tried resetting all the configs, beacuse before that, I had a “mismatched mod channe list”, which somehow disappeared after a restart, but this exception came to it’s place.

And even, if I remove all of the mods, and launch the server with SpongeForge only, it keeps throwing: “Connection colsed - mismatched mod channel list”

Any kind of idea what can cause this error? I haven’t seen any mod between the lines, only just Sponge references. I’ve used Sponge a few times, but never encountered such a thing.

Thank you!