Error: Called in a non-server-main thread.

[MarijnIsN00B]

Hey I keep getting this error, how can I fix this?
My logs

[dimthread_server_alternate5/ERROR] [qouteall.imm_ptl.core.chunk_loading.ImmPtlChunkTickets/]: Called in a non-server-main thread.
java.lang.Throwable: null

[RetroTheBlackGoo]

Can confirm this issue, I'm getting this with immersive portals too...
Edit: dim threads AND immersive portals, not one or the other