You need to run emulator inside Block Editor.
Open App Inventor
Open the Blocks editor. It will take few seconds to open blocks editor.
Click "New Emulator" on the top right.
It will take may be a minute to run the emulatorNow Click "connect to device" (on the right side of new emulator)
This will ask you to connect with the emulator.
If you need more help, go here:
Setup - App Inventor for Android
Cheers
Tuhin
