Protontricks was closed due to the following error:
No Proton enabled Steam apps were found. Have you launched one of the apps at least once?
Please include this entire error message when making a bug report.
Found Steam directory at /home/aurelio/.steam/steam. You can also define Steam directory manually using $STEAM_DIR
Found 0 Steam library folders
Currently logged-in Steam user: aureliowan
Couldn't find custom shortcuts. Maybe none have been created yet?