Sever PlayerMixin Injection failed
and
org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError

Changed requires forge version 40.2.0 or later

Use FORGE 40.2.18 Unable to start server.

The errors in the log you sent indicate the environment is missing certain forge classes. Could it be possible your server is misconfigured?

Also what version of Changed are you using?

How can I fix this issue?

This server log is an old version of FORGE, you should look at this.
2024-11-12-1.log
debug.log

In addition, I used changed: mc 0.14 version, I tried to change other servers such as catserver, arclight and fmlonly, but none of them worked, only changed 0.13.1 can run normally

Probably because this file : changed.refmap.json

I tested 0.14 on a server before release, so it has to be your environment.

InjectionError: Critical injection failure: Argument modifier method foodEfficiencySwimming(F)F in changed.mixins.json:entity.PlayerMixin failed injection check, (0/1) succeeded. Scanned 1 target(s).

This error suggests you have a mod installed that edits player code significantly.

So how can you run this mod normally on the server side?
I don't know how to fix it.