What version of Optifine are you using?

G8

G8

That was not what I meant by version.
This is an example of a version: OptiFine 1.19.4 HD U I4

Optifine HD U G8

Ok well assuming that is the 1.16.5 version then you need to be using Fabric Loader 0.14.25 and remove the uglyscoreboardfix mod if you continue to get errors such as this:
" - Mod 'Ugly Scoreboard Fix' (uglyscoreboardfix) 2.2.2 conflicts with any version of mod 'OptiFabric' (optifabric), which is present with the following versions: 1.13.16!
- While this won't prevent you from starting the game, the developer(s) of mod 'Ugly Scoreboard Fix' (uglyscoreboardfix) have found that this combination may cause issues. You should remove one of the mods or check for updates that resolve the issue."

ok thx i will try it