Installing any APP hardboots phone and bootloops

I have a Oneplus 1 running CM11 44s Kitkat 4.4.4 I did a clean flash of CM11 and now I am unable to install any app from playstore. As soon as an app finishes installing, the phone hardboots and enters bootloop or I get continuous error messages Trebuchet stops working, Play Store stopped working I have to goto Safe Mode and unistall app to recover phone. Apps which I have tried to install and have been unsuccessful Greenify Nova Launcher Facebook Gboard Microsoft SMS Organiser Basically, I am unable to install anything at all! All these were running fine before, now dont understand whats wrong! I cleaned whole phone, formatted all with fastboot and reinstalled CM11, but the problem remains. Please help!!