The APK file is corrupted or incompatible with your Android OS version.

We must address the elephant in the room. Downloading APK and OBB files from third-party sites exists in a legal gray area.

Tap it to start the installation, but yet after it finishes. Locate the OBB Folder

/storage/emulated/0/Android/obb/com.rovio.action/main.51.com.rovio.action.obb

Run the downloaded com.rovio.popcorn APK file. Click Install , but do not open the game once the installation completes.

Using a file manager, go to your internal storage: /Android/obb/ .

Double-check your file directory. Ensure the folder inside the obb directory is named exactly com.rovio.popcorn . Make sure you did not accidentally nest a folder inside another folder during extraction (e.g., obb/com.rovio.popcorn/com.rovio.popcorn/... ). "App Not Installed" Error