I have a fabric 1.21.3 server. Recently I built a few farms that require a player so I set up some carpet bots. with all the bots my server started to drop in TPS. I did some research and found this mod. https://modrinth.com/mod/async It really helps with TPS bringing it back to 20. Unfortunately when spawning in a nether bot it crashes the server. This happened only when Async is installed. Other mods, installed or not, dont seam to effect it.

Also it seams this does not crash the server if Im (in game player) in the nether when the command is triggered.

If anyone knows a fix to this that would be amazing. I would really like to keep 20 TPS.

Here is my crash log:
crash-2025-01-04_04.44.22-server.txt

Not supported. I'd recommend using lithium instead of that.