I don't know what is wrong, but the people in sodium's discord said that this mod caused the issue. When I removed the mod, my modpack started working.

Here is the crash report
crash-2021-04-23_15.54.03-client.txt

I assume you are talking about this Forge port of Sodium?

Can you provide screenshots of the conversation with the Sodium guys? From what I can see in the crash report, this is to blame on them for completely overwriting a method that I am injecting into which means there is basically nothing I can do.

They didn’t really say much, just that this was the problem. All close it then.

I will look into disabling the inject when Sodium is loaded, though that will break the ghost block rendering.

I have now implemented a mitigation for this crash, though it does break the ghost block rendering as expected.