I'm unable to load the mod. Using Forge 31.2.55 [ for Minecraft 1.15.2 ] and with only Minestuck 1.6.1.0 in my mods folder, booting up the game gives the error "Mod minestuck requires geckolib3 3.0 or above." Geckolib 3.0 is for Minecraft 1.16.4, and installing it and booting up the game will give an error that says Geckolib "...needs language provider javafml:34 or above to load." [ This is an error that occurs when installing mods meant for later versions of minecraft. ] However, installing the Geckolib version for the correct version of Minecraft, that being Geckolib 2.0 for Minecraft 1.15.2, returns the original error.

Geckolib 2.0 is not the latest version of geckolib for minecraft 1.15.2. Where are you finding geckolib 2.0 to be the relevant version?