Hey, repeatedly I launch Grand Theft Auto 5 Enhanced (Epic Games) and Rockstar Launcher fails to boot.
An error has occurred. Please make sure all instances of the Rockstar Games Launcher have been closed and try again. If you continue to see this error, please visit: https:// support. rockstargames.com)
It seems to me I found a solution.
Try changing the runtime to "umu" for first Rockstar Social Club launch. When launcher boots, shut down the launcher and change runtime to "Proton GE Latest". After this steps the gta launches flawlessly on my bazzite desktop.
Hopefully people will find the post with Discord search.