Please go through this procedure before filing an issue on the App Inventor forum. The issues are the same for MacOS and we will be publishing a Mac version of this document soon.) This gives a step-by-step procedure for attempting to isolate and ifix issues. If you encounter a problem connecting to the emulator, visit the pageĭebugging issues in running the App Inventor Setup Tools and the emulator on Windows Symptoms you might encounter include the emulator starting up and then freezing, or not starting at all, or App Inventor displaying 'unable to connect' messages. For school computers, we've seen several issues that interfere with App Inventor, including firewalls on school networks, restrictions on software the the machines can run, and ports being blocked. There are many things that can go wrong, such as unexpected configurations, restrictions on the network you are using, or other software running on your computer that interferes with App Inventor. The process that starts the emulator involves several programs working together.
The emulator should start on your computer, and connect to App Inventor so you can test your app and do live development. To use the emulator, choose Emulator from the Connect dropdown menu. App Inventor provides an Android emulator for people who do not have Android devices, or who would prefer not to use one while creating apps.
