Unfortunately system.ui is stopped in android version with moto e 2nd gen mobile

[AC Question]

In my mobile suddenlt "Unfortunately process.com system.ui" was stopped alert came and after that only the Motorolla mobile symbol only showwing.. Tried to do the Factory rest also... No use... Ifi choose the factory rest after that it shows the andriod sysmbol only with out any option in the screen.. Please help me