Android Studio - Emulator doesn't load my app

Question

I'm using android studio about 2 weeks and everything is going right until I try to create a new app and the android studio ask me for updates to API level 22 and I did it. After this update my emulator doesn't load my app anymore, the emulator opens but the app doesn't show up and even appears at emulator.

Log:

Device Nexus_5_API_21_x86 [emulator-5554] is online, waiting for processes to start up..

I try to uninstall and install again the android studio but even reinstalling with API level 21 keep not working.

Even the default Hello World application doesn't load and not show up at my emulator.

Solution

I had the same issue, and was able to work around it by manually starting the emulator first, then running the app and choosing the running emulator