Version Info

• Minecraft, 1.21.1
• Moving Elevators, 1.4.10

Are you using OptiFine?: No

Steps to Reproduce
Good question, I just teleported to a waystone that I've teleported to a dozen times & crashed to desktop

Crash report (~/logs/latest.log)
https://mclo.gs/J8p1igh

I have fixed this now in version 1.4.11 of Moving Elevators.
Thank you for reporting the issue!