I also got the Mauve Adder error, but I figured out what my problem was. I've played for over a week with no issues, and then this morning I changed a setting in my Radeon Software icon in my system tray, I changed it from 'Standard' to 'Gaming', hoping it would help it to work better. When I started playing again I got 3 Mauve Adder errors within around an hour. I ended up looking for solutions online, and nothing sounded like it made sense, so I changed the setting on my Radeon back to 'Standard', and didn't get the error after that. I played several more hours since that and it's been great. I'll put a screenshot of the Radeon Software thing I changed in case it helps.