Well i had the same issue with emw30b. It is an odd bug. For me everything was working and then suddenly any kind of link to the desktop was lost. So check if file transfer still works. I even formatted my desktop, but still same issue. But the phone works perfectly on my laptop. Odd...It is recognized by my pc even ive transferred files across my pc and phone and even ive used adb commands to uninstall some Google apps from my phone
Hope you were able to unlock bootloader before itself to install this rom.