No me carga el emulador De mit app inventor

[Juan_Antonio]

Check out some links in the FAQ section about the emulator.

App Inventor emulator blank screen on Win10

Welcome. It appears the emulator's Companion failed to update automatically (as it is supposed to). While the emulator is working you can update manually. Help>Update the Companion ; . Follow the directions on the screen to perform the update and reconnect the emulator. You may need to do this kind of update whenever there is a new version of the App Inventor software. The emulator needs to be running when you do this.