THERE WAS A PROBLEM PARSING THE PACKAGE.

CAUSES:

1.  APK file is corrupted.

SOLUTION:

Download it from another source.

2. The App is no longer supported on your android version.

SOLUTION:

Download apps compatible with your device.

3. APK download destination is corrupted.

SOLUTION:

Change destination of downloads to internal.

4. File APK download is incomplete.

Make sure you have a good internet connection, Refresh the site and wait for the download to complete.