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!!
For me it is the FaceBook app that causes the bootloop. I have CM11 on a Nexus 7. I used the Play store to update a few apps last week and when I came back to it, it was looping. I did several factory resets and found it was the latest FB app. I get an instant bootloop on installing. I just decided not to use it :)  Of course whatever the issue is (maybe some issue Android Studio is introducing that CM11 does not like) may affect other apps.