Tried it, and changed a bunch more settings and it works.
Not sure what made it work because it is running on the integrated card instead of the GeForce one (probably just because I have not restarted the PC yet) but all packs load up now.
Thank you for your help.
Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: com.mojang.text2speech.Narrator
This line refers to the issue with dawnera - this should be fixed in a future update
@TileEntity Thank you bro, that solved the problem, you're a legend. How did you find the error? I don't see nothing suspicious about that mod in the crash report
Add crash-reports with sites like https://paste.ee/ and paste the link to it here
There is an issue with spectrelib - try other builds or remove this mod and the mods requiring it