Hi. In case you did not know, Mobdro did an update which was a bad one and left everyone with a blank screen. (only on Mobdro program)
Well they have now did another one which has corrected the last one. This has been called 2.1.2.
You will have to uninstall the bad one using Settings , Apps, then uninstall. Next you will have to go to Google using your box and install the new update.
This does not happen very often but now and again the programmers make a big mistake but sometimes you just do an update and all is fine.