however i have gta 5 in my epic games library..
U wasnt so clear in this point , i thought you have the epic version too.
So now the problem that you are facing is that nothing happens when u launch ragemp.
First of all make sure that ragemp in is C drive ! and atleast play gta5 10 minutes and do a savegame
1.Check on task manager if gtalaucher.exe(or gta5.exe) is open -if yes go on point 2
-if not , recheck ragemp directory option(screen that pls),try to run ragemp when steam is on/off(try both).
2.Reinstall ragemp client. make sure that ragemp in is C drive !
3.delete any mods or better verify the directory files(youtube (https://www.youtube.com/watch?v=1pZX6YWH4XQ))
if u have those files in directory delete them dxgi.dll, Sweet.fx or ReShade.fx ,SweetFX folder
4. U have to reinstall all :)(happy redownload)
5.(https://media.tenor.com/images/0f5d4e30305bbe49544d672a70ab9d2a/tenor.gif)