when the forge modloading does deep scans of mods there is a sudden prompt in the loader 'Launching minecraft'. Then the modloader keeps loading with blank red window and modded minecraft instance is created with not even forge loaded in the minecraft instance. When the minecraft instance is exited by normal exiting, this crash report is generated - Crash report.
Mods not loading in the new forge version for 1.16.4.
when running the instance it creates two fml-loading screen.
One of the screen launches the game with no mods loaded and the other keeps on loading through till mincraft instance is closed.
the lof file for that instance is - log file