"App Not Installed" or "Parse Error" on Android — Every Fix That Works
"App not installed" and "There was a problem parsing the package" are the two most common errors when sideloading any Android APK — not specific to one app or one device. Both mean Android downloaded the file but refused to install it, for one of a handful of well-understood reasons. Work through these in order; most people are fixed by the first two.
1. Unknown Sources isn't actually enabled for the app you're using
This is the single most common cause. Modern Android (8.0+) grants the "install unknown apps" permission per app, not globally — so enabling it once for your file manager doesn't cover your browser, and vice versa.
- Go to Settings → Apps → [the app you used to open the APK, e.g. Chrome, Files, or Downloader] → Install unknown apps.
- Make sure the toggle is on for that specific app.
- On Fire TV / Android TV, this lives under Settings → My Fire TV → Developer Options → Install Unknown Apps, listed per source app.
2. The download didn't finish, or got corrupted
A partial or interrupted download is the second most common cause of "parsing" errors specifically — Android can tell the file is broken and refuses to open it.
- Delete the file completely and re-download it — don't just retry the install on the same file.
- If you're on Wi-Fi with a weak signal, switch to mobile data (or vice versa) for the re-download.
- Check the file size after download. The NetflixKing APK should be roughly 30 MB — if your downloaded file is noticeably smaller, it didn't finish.
3. An older version is already installed under a different signature
Android refuses to install an APK over an existing app if the two were signed with different developer keys — even if it's technically "the same app." This shows up as a plain "App not installed" with no further detail.
- Go to Settings → Apps, find the existing installation, and uninstall it completely first.
- Then install the fresh APK as a clean install.
- This is the most likely cause if the error appeared only after you tried updating an app you already had working.
4. Not enough storage space
Android's installer sometimes fails silently on low storage rather than showing a clear "storage full" message.
- Check Settings → Storage and confirm you have at least 200–300 MB free — more than the app itself needs, since Android needs working room to unpack and install it.
- On Fire TV devices with 8 GB of onboard storage, this is a common culprit after a few apps and their caches build up.
5. Google Play Protect is blocking it
On phones and tablets with Play Store installed, Play Protect can flag any APK from outside the Store, even a completely safe one, simply because it doesn't recognize the source.
- If you see a Play Protect warning screen instead of an install prompt, look for "Install anyway" or "More details" — it's a warning, not a hard block, on most Android versions.
- You can also turn off scanning temporarily under Play Store → Profile icon → Play Protect → Settings → Scan apps with Play Protect, install, then turn it back on.
6. Your Android version is too old
NetflixKing targets Android 8.0 and up. On anything older, installation can fail or the app can install but immediately crash.
- Check your Android version under Settings → About Device → Android Version.
- There's no workaround for this one beyond updating the device's OS if an update is available, or using a newer device.
7. You downloaded an HTML page instead of the APK
This happens more than you'd expect: a flaky connection or a copy-pasted link with extra characters can save an error page with a ".apk" name instead of the real file, which then fails to "parse" because it isn't actually an APK.
- Open a file manager and check the downloaded file's actual size — a real APK is tens of megabytes; a mistakenly-saved error page is usually a few kilobytes.
- Re-type the URL by hand rather than pasting if you suspect this —
netflixking.com/downloads/NetflixKing.apk— instead of tapping a link from an unreliable source.
Still stuck?
If none of the above resolves it, it's worth checking the device model specifically — a small number of budget Android TV boxes ship with modified firmware that restricts sideloading entirely, which no in-app setting can work around. See our Fire TV Stick install guide for the sideloading steps this troubleshooting builds on, or contact [email protected] with your device model and we'll help directly.