Unfortunately, System UI has stopped

I have PAC-ROM Paranoid-Android (downloaded and flashed from [here](http://forum.xda-developers.com/showthread.php?t=2235446)) , and suddenly, after changing some settings (unfortunately I can't reproduce an annoying message started popping up every 2 seconds, it says "Unfortunately, System UI has stopped.". Has anyone faced this before? Does anyone know how to reproduce the issue or what setting is causing that? I'm sure reflashing the ROM will solve the issue, but I prefer avoiding a reconfiguration of all my personal settings. **UPDATE** I'm noticing now, that since that message started to bug up, the status bar is gone.