vanishmod crash with ketting

[DeltaFlick12]

Basic questions:

• [X] I am actually using ketting, and not any other software (e.g. magma)
• [X] I am using the latest Ketting version at the time of writing for the Minecraft version, that I am using
• [ ] I have provided full server logs and not a crash-report
• [ ] I have checked all items without reading.
• [x] I have provided proper reproduction steps
• [ ] I have ticked all boxes

What Minecraft Version is your Server on?

1.20.1

Full Ketting Version

0.2.15/1.20.1

Description of behavior

crash using vanishmod https://www.curseforge.com/minecraft/mc-mods/vanishmod

Reproduction Steps

Steps to reproduce the behavior:
1. Download vanishmod
2. Run the server
3. crash when someone enter in the server

Logs

https://mclo.gs/K21AuHA

Additional context

No response

[DeltaFlick12]

any fix?