Aternos crashes upon starting Create server

[CotoDude]

Describe the Bug

Me and a friend are trying to play the mod together, and whenever we try to use it on the Aternos server server, it has a fatal error. Any help?

Reproduction Steps

1. Got to Aternos
2. Create server
3. add create
4. start server
5. Watch ad
6. [13Nov2023 01:38:11.058] [main/ERROR] [net.minecraft.CrashReport/]: Negative index in crash report handler (17/19)

Expected Result

a complete and utter breakdown of Aternos.

Screenshots and Videos

Crash Report or Log

https://mclo.gs/NUyZHXk

Operating System

Windows 11

Mod Version

0.5.1f

Minecraft Version

1.20.1

Forge Version

47.2.0

Other Mods

none.

Additional Context

No response

[drwoops]

please attach the crash report (the log is less useful)

[CotoDude]

please attach the crash report (the log is less useful)

Oh! Sorry. I must have clicked the wrong thing. I got the issue resolved, it was a version mismatch.

[drwoops]

then please close this issue

[CotoDude]

then please close this issue

May I please have some help with that? I don't have much experience with github.
Oh nevermind I saw the button. Thanks!