WAIT WAIT WAIT, SHOW ME THIS MAGIC. GIVE STEP BY STEP INSTRUCTIONS ON HOW YOU DID THIS. I WILL PRAISE YOU AS MY GOD. LITERALLY, NO BULL SHIT.
but, i've done it before. the client opens but ofc the screen of the client is dark idk why. probably because it can't access the files or something cause you only bottled the .exe file for the launcher nothing else so all it does it runs the thing i guess. If you mean your computer screen goes blank than thats something new cause when i did it, all i had was the client itself have a black screen