Make a test with adding this mod:
https://www.curseforge.com/minecraft/mc-mods/betterrandomsourceconcurrencycrash
If you have further issues, create an own thread
It is always a Registry Object not present error - with removing mods, just new mods are mentioned
Does a pre-configured modpack work? Maybe use such a modpack as working base and add new mods one by one
How much RAM do you have allocated? (JVM-Arguments)