I launched fabric API through forge while running the Origins mod and it said Fabric API is a fabric API mod and it wont open same with the origins mod i tried to install fabric API and it didn't open i even updated java and it still wouldn't open. I don't know what to do anymore
1.Fabric API is not an installer, the installer is on the Fabric Website here: https://fabricmc.net/use/, Fabric API is needed for the mods in the mods folder to work just like libraries are on Forge (for example Mantle for Tinkers Construct).
2.Fabric and Forge are NOT compatible meaning their mods aren't either. You have to use Fabric and Forge separately. It's not like Liteloader where you could run its mods alongside Forge on 1.12.2.