There are two primary scenarios that trigger this error.
The error means that one of the mods you have installed was built for Minecraft version 1.16.5 , but you are trying to run it on a different version (likely 1.16.4 or 1.16.3), or you are missing the specific Forge version required to run it.
Mod File Needs Language Provider Javafml 36 //free\\
There are two primary scenarios that trigger this error.
The error means that one of the mods you have installed was built for Minecraft version 1.16.5 , but you are trying to run it on a different version (likely 1.16.4 or 1.16.3), or you are missing the specific Forge version required to run it. mod file needs language provider javafml 36