[Q] Moto g 1st gen : "Unfortunately system ui has stopped " problem. topic

I bricked my moto g XT1033 and flashed a custom recovery (Clockworkmod) but when I started the custom recovery a wavy blurriness keeps sweeping the screen. Then I flashed cm12 nightly build and the problem was still there but a new problem started. This message : "Unfortunately, system ui has stopped" keeps popping at half a second interval. The wavy line problem stops after 5-10 mins after boot but the popup problem persists. Maybe the two problems are interrelated. I have tried factory reset, wiping cache, system and all data but to no avail. I have tried flashing cm again too. Please help !!!! :(