There is an issue with Optifine and this mod. Every time the two mods are installed together the game crashes. It doesn't leave a crash report as it's just an issue between two mods. If you could, please fix this ASAp, as almost every mod I use needs Cloth API.

Also, if you could, please bring back your support channel on discord as it's the only way I can get a straight answer on the issue.

Will leave in this topic a crash log with an error launching OptiFabric and Cloth API on MC version 1.18.1 @shedaniel
crash-2022-02-13_20.23.40-client.txt

We don't support OptiFabric, it is on them to do so.