Could you post a screenshot with that error message? This guide will show you how to do it.
http://forums.androidcentral.com/sho...d.php?t=413366
[GUIDE] How To Post Screenshots on Android Central
In the meantime you could check a couple of things. If this error is included in Qslide, open the edit option and see what apps and widgets are checked in that list. Maybe there's an app that was disabled or is just sitting idle in the smart cleaning list.
I've never used that phone so I'll check with other Ambassadors that own the G4 and see if they have more ideas.