It is possible to run Minecraft but, as mentioned above, if i try to enter a world MC crashes.
I tryed only optifabric and it worked with a shader but i also want to install Xaero's wolrd and minimap so fabric-api is necessary.
Does anyone else have a problem like this or a recommendation how to fix it?

The versions im using are:
Fabric-api: 0.43.1+1.19
Optifabric: 1.12.6
OptiFine: preview_OptFine_1.18_HD_U_H3_pre4

i had the same issue yesterday, the only fix that i found, until optifabric gets updated, is to not use any other additional mods other than optifabric and optifine itself

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Same issue, modified the jar to load 1.18 but it crashes when loading the world, Here is my Log: (https://pastebin.com/bbgHBdga)
I can't play without a map mod so i'll have to wait until Optifabric is updated.