If you Arlo app is not responding then try this trouble shooting to get it back on working mode, there must be reliable and sturdy internet connection, reboot the app, check the app’s version and if it requires an update then update it with latest version, close the app and then start it again, clean the history that contains caches which can also land you in this trouble. Reinstalling the app can also help, or try login to Arlo again by exiting the app, delete the app and install it again and complete the login.