Site admins should see a warning asking them to enable the Mobile notifications plugin after registering for an Airnotifier key

To register your site you will need a real address for your site. Consider using ngrok . As admin, go to "Site administration > Registration" and register your site. Go to "Site administration >  Mobile app > Mobile settings". Make sure "Enable web services for mobile devices" is disabled. Go to "Site administration >  Messaging > Notification settings". Make sure the option "Mobile" in "Notification plugins" is disabled. Click "Settings" next to "Mobile" in "Notification plugins". Click "Request access key". Check that you see a success message saying "Key retrieved successfully" and two warnings: one tells you to enable Mobile notifications and the other tells you to enable the Moodle app. Open in a new tab the link in the "Mobile notifications" warning. Check that it opens the page "Site administration >  Messaging > Notification settings". Enable the "Mobile" option and save. Go to the tab of step 6 and open in a new tab the link in the "Moodle app" warning. Check that it opens the "Site administration >  Mobile app > Mobile settings". Enable "Enable web services for mobile devices" and save. Go to the tab of step 6 and click the "Continue" button. Check that it sends you to "Site administration > Messaging > Mobile". Click "Request access key" again.  Check that you see a success message saying "Key retrieved successfully" and no warning is displayed.