Catch ArgumentException when trying to read the game process environment variables

[WRMSRwasTaken]

This is my workaround for https://github.com/blish-hud/Blish-HUD/issues/698 where Blish-HUD fails to parse the environment variables on my machine. Adding this doesn't seem to affect the functionality for me, I am able to start it and load plugins normally.

Maybe it's better to consolidate those three catch blocks into a single generic one?