The mod is downloaded from https://www.curseforge.com/minecraft/mc-mods/snow-real-magic/files/3082729 and im using forge with optifine 1.16.3 - 34.1.25 and i got in the log

[01:40:58] [Render thread/FATAL] [ne.mi.fm.ModLoader/CORE]: Error during pre-loading phase
net.minecraftforge.fml.ModLoadingException: Mod File SnowRealMagic-1.16.3-2.2.1.jar needs language provider javafml:34.1 or above to load
§7We have found 34.0

What launcher are you using?

TLauncher and custom script to elimate using launcher ever time to launch minecraft

i only use TLauncher to generate run command then put my custom JVM flags to increase performace

i use latest forge from the forge site

and i regenerate the script with TLauncher a lot and triple check what version i start

crash-2020-10-22_16.14.48-fml.txt
the crash report file if you need one

The crash report shows you are using Forge 34.0.1

wait, sorry i taking your time into this

i dont know what wrong with the TLauncher