crash-2024-03-25_14.04.31-client.txt

It is still crashing on launch.
crash-2024-03-26_08.23.58-client.txt

Try using Fabric Loader 0.14.25 and Fabric API 0.85.

It is still crashing on launch. crash-2024-03-26_08.23.58-client.txt

For grins and giggles, just launch the game with the 0.14.25 fabric loader profile and only using the Fabric API, Optifabric 1.14.3, and 1.20.1 OptiFine HD U I6 (You will need to download this 1 as it is an updated version to the 1 you are using). Try this and see if it launches. IF it does then add in just a few of your mods and try again. When it finally crashes we will then know better which mod may be conflicting.

After testing, I've found that the game gives a "Resource reload failed" on the upper right of the screen when Unicopia alone is paired with the suggested combination. You can remain on the title screen, but creating or loading a world crashes the game.
crash-2024-03-26_12.38.43-client.txt

What if you used Unicopia 1.3.3?

Updating the mod leads to complete incompatibility with the suggested combination. With all mods fully up to date, Optifabric still conflicts with Unicopia.

Hmmm well then you may have to wait until either an update to optifabric or someone more knowledgeable than I to help you out.