I have been having the same issue as a lot of people here, with other mods MC works just fine but as soon as I put the Optifabric mod in it either crashes or opens up the game and gives weird symbols. If someone can come up with a solution, that would be great. Thanks.

Use Fabric Loader 0.14.25 and Fabric API 0.85.0

I tired and I still come up with the same error. This is all the mods that I have in the files.

Disregard the previous message. I just was able to figure it out by changing the loader version and that did it. Thanks so much and happy holidays!