Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:
1.update to newes version
2. start game
3. minecraft crahses at the last stage (using 1.12.2 pack perfectly complex)
4. see error (log says its ultimate backport and ido

Expected behavior
minecraft starting and i get to the main menu

Desktop (please complete the following information):

• OS: windows 10
• Browser Crome
• Version 100

this did not happed in the prev version of the mod i tested that and it started just normally up

here the crash report file
crash-2022-05-21_23.51.53-client.txt
!

OK, in a few minutes I will release a hotfix update. I hope that it will work.