The Essentials mod (the one which allows Cosmetics, and making singleplayer world into multiplayer) is, I think not compatible with OptiFabric & Optifine...

As soon as I launch the game, it just crashes and does not even show what the problem is, except Exit Code: 1

Version: 1.19.4

Mods:

• Essential [v1.0.0]
• Fabric API [v0.84.0]
• Mod Menu [v6.2.1]
• OptiFabric [v1.13.24]
• Optifine [HD U I4]

Using Fabric Loader: 0.14.21-1.19.4

If needed, here's the log:
latest.log