A shader pack took the game down
Applies to the game client.
What it looks like in your log
Failed to load shaderpack ComplementaryShaders_v5.zip
What causes it
The crash happened inside the shader pipeline: the pack does not suit this game version, the GPU, or the shader mod build.
How to fix it
Remove or swap the shader pack first. If the game then runs, update Iris or Oculus and try a pack built for your version.
Not sure this is your problem? Paste your log and Roastd will tell you which of these it actually matched, and what else it found.
Check your own log