Emulator in Android Studio doesn't start

I think it's a problem with the SDK reference in Project Structure, but when I click run and I choose Launch Emulator nothing appears.

Why emulator is not opening?

If the Android Emulator does not start properly, this problem is often related to discovering that your application's minimum SDK is higher than your emulator SDK. If that's not the case, make sure you have HAXM installer on your SDK Manager.

Why is my android emulator black?

In newer versions of Android Studio, this is called "Wipe Data", and it is in the right-click menu for the device in the virtual device manager. This worked for me, thank you. In VS 2019, go to Android Device Manager, right click and, "factory reset". I had a black screen emulator and this resolved the problem for me.

I had the same problem. I just created the AVD with 768 MB RAM and it did run fine!