Null Pointer Exception Crash: Cannot assign field "rotation" because "this.triangle" is null

[mesmerica]

Steps to reproduce

1. Launch the game with Meteor
2. Open Meteor Client's GUI
3. Crash occurs

Link to crash report/log (upload to https://mclo.gs and paste resulting link here)

https://mclo.gs/8jUaLQP

Meteor Version

26.1.2

Minecraft Version

26.1.2

Operating System

Windows

Before submitting a crash report

• This crash wasn't already reported (I have searched crash reports on GitHub).

• This is a valid crash (I am able to reproduce this on the latest dev build).

[mesmerica]

I have seen #6325 but it does not provide logs nor does it give any other info. I hope this is more informative than the other issue even if it's technically a duplicate of that issue.