Sometimes when building I can download, install and launch
Sometimes I can download only, I have to install manually from download folder
Do you use the companion app to scan the apk QR code ? This works well for me in initiating the installer.
Try to scan the QR code in Build -> APK using a regular QR scanner (not the companion). To install it, click on the result, which is a link, in the QR scanner.
Yes, I'm using Companion 2.62, sometimes it works well, sometimes no
I tried, same result, today I can only download the apk.
Did you enable downloading APKs for your browser? Try to open the APK. Without opening the APK, you cannot install it.
I don't know how. I'm using Chrome, but as I said sometimes I have no problems
Try to watch this video. This is my teacher explaining how to download apps from App Inventor.
(Please don't share this video worldwide!)
(Note: App Inventor has some minor changes recently, the Generate QR code for APK is now just Android App APK.)