Mod File Needs Language Provider Javafml 36 !!exclusive!! -

This is the most common cause. You have downloaded a mod designed for 1.16.5, but you installed the Forge profile for 1.16.4.

Visit a repository like CurseForge and download a version of that mod explicitly labeled for your exact Minecraft version. mod file needs language provider javafml 36

If you accidentally placed a Fabric mod into your mods folder while running Forge, remove it. This is the most common cause