One of the mods has an invalid animation json - but this mod is not mentioned
Start with GeckoLib and AzureLib and the mods requiring it
If this works, add the rest of your mods one by one or in groups until you find the one, causing this issue
Create a new modpack instance and only start with these two mods - try different builds until you find a working combination - then add the rest of your mods
Run Minecraft 1.20.1 fist:
Create a new Installation and select Minecraft 1.20.1 - save it and run this profile once (close it in main menu)
Then run the Forge installer again