Happens on My Nether's Delight 1.20.1-1.7.6: [Worker-ResourceReload-4/ERROR] [net.minecraftforge.common.ForgeHooks/]: Couldn't parse element loot_tables ...
About the custom launcher, you should be able to use it if you can point it to a different .minecraft directory. I'm using TLauncher for its own preinstalled Forge and Fabric mods. And I added this ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback