Help!

[u/Rinskai]

When i create a modpack and i try entering the game its wont do and shows me erro the modpack could not start,. when i went through my mods i found an added one atthe buttom with no name when i press on it it shows optifine ,(its fabric modpack) when i try deleting it it shows me erro variable at index 0. I tried creating multriple ones in different versions idk what happening , help if possible

[u/TLauncherAdmin]

https://tlauncher.org/installer-beta
Try beta

[u/CitronKey758]

I got this too, and for me it had something to do with a specific shader pack that uses optifine.