Version = lithium 0.11.2 Fabric

Reproduction Steps

Start the server
crashes

latest.log= https://mclo.gs/TmXUawC
Crash report = https://mclo.gs/TZU1dCN

Additional Information
The issue seems to be caused by the latest performant version as no performant or an older version of the mod doesnt result in a crash

disabling the mixin entity fast retrieval also fixes the crash

The incompatibility is listed on Performant's mod page under "Compatibility". There is probably no other option (for now at least) than disabling the mixin as you said or disabling either Lithium or Performant.

Not going to fix this. Performant is closed source, and their authors have wrongly accused us in the past of stealing their code, among other things.