Use a file manager app to find midiag.apk. Common locations include:
If you can’t find it, search your device using the file manager’s search function for midiag.apk. If the file is missing, redownload the firmware or tool package you were using. Use a file manager app to find midiag
If you cannot find the file in your storage, the system might be "confused." It thinks there is a pending installation when there isn't one. Clearing the cache of the system component responsible for installations can break this loop. If you can’t find it, search your device
The original app may still think the APK is missing. The original app may still think the APK is missing
Once midiag.apk is installed:
I navigated to /storage/emulated/0/Download/, tapped midiag.apk, and—finally—the Android package installer woke up.
Done. 8.2 MB. 4 seconds.