How to Fix “App Not Installed” Error on Alight Motion Pro (2025 Solved)

Why Does This Error Happen? (The Hidden Causes)

Before we fix it, you need to understand why Android is rejecting the app.

Cause 1: The “Signature Conflict” (Original vs. Mod)

Android security prevents you from having two apps with the same “Package Name” (e.g., com.alightcreative.motion) installed at the same time unless they have the exact same digital signature.

• The Conflict: The official Play Store version has a “Google Signature.” The Mod version has a “Test Signature.” Android sees they don’t match and blocks the install to protect you.

Cause 2: Google Play Protect Interference

Google Play Protect scans every app you install. Since Mod APKs are modified code, Play Protect often flags them as “Unrecognized” or “Risky” and silently blocks the installation.

Cause 3: Corrupted APK File

If your internet cut out for even a second during the download, the file might be incomplete. An incomplete am mod APK is missing the “End of File” marker, causing the installer to crash instantly.

Solution 1: The “Clean Uninstall” Method (Most Common Fix)

This method fixes the error for 80% of users. You must remove every trace of the original app before installing the mod.

Step 1: Uninstall the Play Store Version

1. Go to your App Drawer.
2. Long-press on the Alight Motion icon.
3. Tap Uninstall.

Step 2: Clear “Package Installer” Cache

Sometimes, the phone “remembers” the old installation even after you delete it.

• Go to Settings > Apps > Manage Apps.
• Tap the 3 dots (top right) and select “Show System Apps”.
• Search for “Package Installer”.
• Tap Storage > Clear Data & Clear Cache.

Critical: Check “Secure Folder” & “Second Space”

This is the secret step. If you use a Samsung (Secure Folder) or Xiaomi/Redmi (Second Space/Dual Apps) phone, the app might still be installed inside those hidden profiles.

• The Fix: Open your Secure Folder or Dual Apps settings and ensure Alight Motion is deleted there too. If a copy exists anywhere on the phone, the new “App Not Installed” error will persist.

Solution 2: Disabling Play Protect (The “Blocker” Fix)

If you are sure the APK is safe (you downloaded it from a trusted source like ours), you can temporarily tell Google to look the other way.

How to Turn Off “Scan Apps with Play Protect”

1. Open the Google Play Store app.
2. Tap your Profile Picture (top right).
3. Tap Play Protect.
4. Tap the Settings Gear icon (top right).
5. Turn OFF the toggle for “Scan apps with Play Protect”.
6. Try installing the APK again.
   • Note: You can turn this back ON after the installation is complete.

Solution 3: Storage & Version Checks

Sometimes, the problem is hardware, not software.

Minimum Storage Requirements (2GB Rule)

Android requires slightly more space than the APK size to unpack and install the files.

• The Rule: If the APK is 150MB, you need at least 500MB – 1GB of free space.
• Check: Go to Settings > Storage. If your bar is red (99% full), delete some videos and try again.

Android Version Compatibility

• Too Old: Alight Motion v5.0+ requires Android 6.0 or higher. It will not install on Android 5 (Lollipop).
• Too New: Some older Mods (v3.x) are 32-bit apps. The new Pixel 7/8 and Android 14 devices only support 64-bit apps. If you are on a new phone, you must use the latest version of Alight Motion; old versions simply won’t install.

Advanced Fix: Using “APK Editor” to Sign the App

If nothing else works, you can force the installation by changing the app’s internal ID. This is for advanced users.

How to Change the Package Name to Force Install

1. Download the APK Editor Pro app (Google it).
2. Open it and select “Select an APK File”.
3. Find your Alight Motion Mod APK.
4. Select “Common Edit”.
5. Find the field labeled “Package Name” (usually com.alightcreative.motion).
6. Change it slightly (e.g., change motion to motion2).
7. Tap Save.
8. The app will build a new APK with a unique ID. Install this new file.
   • Why this works: Android treats it as a brand new app, ignoring any conflicts with previous versions.

Troubleshooting: “Package Seems Corrupt” Error

If the error message specifically says “The package appears to be corrupt”:

1. Do NOT use Chrome: Sometimes Chrome’s download manager glitches.
2. Use ADM: Download “Advanced Download Manager” from the Play Store and use it to download the APK. It ensures zero data loss.
3. Check File Size: Compare the size of your downloaded file to the size listed on the website. If the site says 140MB and you have 80MB, the download failed.