Before reporting, make sure your problem isn't caused by the game running out of RAM and you have read the installation guide carefully.
If the game crashes to your desktop without showing a crash screen it's a RAM issue. Don't submit this kind of issue. Please view the installation guide for how to solve this issue.
If this is not the case check the checkbox below by replacing the space between brackets with an 'x'.

• [ X] Yes, I'm sure this problem isn't because my game ran out of RAM.

Describe the bug
A clear and concise description of what the bug is.
Well i Try to load my world and it just sends me back to the main screen with a crash report doesnt let me load into the world
To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.
it should spawn me in my world
Screenshots
If applicable, add screenshots to help explain your problem.

its just shows whenever i try to load into the world
Crash reports or logs
https://paste.ubuntu.com/p/ndFWGCcXv2/

If the problem causes a crash, please paste your crash report to a online pastebin like Ubuntu Paste and copy the link after pasting and paste it here. Crash report can be found in your crash-reports folder located in your Minecraft instance folder.
Latest log can be found in latest.log file in your logs folder.

Details
Please fill out the blanks below:
Modpack Version: ( 21.12.2 )
Did you add or remove mods? ( no )
Did you edit any config or script? ( no )
Using shaders? [Write 'Default' if you are using default shader, if you are not using the default shader please write the name of the shader you are using.] ( ComplementaryShaders_v4.0.2 )
Singleplayer, LAN game or server pack? ( Singleplayer )

Additional context
Add any other context about the problem here.
last time i played on the world was 2-3 months ago and it was all fine and now its just not working