So what does your mods folder look like? And can you upload your latest.log?

I recommend switching to alternatives to OptiFine.
https://lambdaurora.dev/optifine_alternatives/
https://fabricmc.net/wiki/community:optifine_alternatives
https://github.com/TheUsefulLists/UsefulMods
https://fabulously-optimized.gitbook.io/modpack/readme/give-up-optifine
https://github.com/skywardmc/additive/wiki/Give-up-OptiFine

You can find your latest.log in your logs folder.

You're missing OptiFine, just as the message said. Why did you need to create an issue to say this? OptiFabric does not replace OptiFine. It only tries to make it run on Fabric.

wdym latest.log?

i'm sry i dont understand

and

Let me repeat myself:

You're missing OptiFine, just as the message said. Why did you need to create an issue to say this? OptiFabric does not replace OptiFine. It only tries to make it run on Fabric.

Read the description.
https://www.curseforge.com/minecraft/mc-mods/optifabric

Then download OptiFine and add it to your mods folder.
https://optifine.net/home

a?

this one is OptiFine Hd U I2

theres three version

and when i try the second one, this is what i get

this one is OptiFine Hd U I1

crash-2023-10-06_19.21.57-client.txt
and this is the crash report

OptiFine isn't going to be compatible with a lot of things. You should use alternatives to it for Fabric. I've linked to alternatives above. Personally I use the Fabulously Optimized modpack in Prism Launcher and then add mods to it.

THANK YOU SO MUCH

OptiFine isn't going to be compatible with a lot of things. You should use alternatives to it for Fabric. I've linked to alternatives above. Personally I use the Fabulously Optimized modpack in Prism Launcher and then add mods to it.

now i am downloading the Fabulously Optimized modpack, wish me luck

Anyway, as this isn't a bug in OptiFabric, you can close this issue, @cayonnaise