FINALLY! MANAGE TO INSTALL THE MODDED VERSION OF KINGDOM TWO CROWNS!!! HERE'S WHAT I DID.
1. Close all apps and restart your phone.
2. Go to Google Playstore. And make sure the play protect is SERIOUSLY disabled.
3. After closing the google playstore. Go to settings.
4. On the settings app. Look for the Apps menu or just simply the storage menu.
5. Find Google Playstore. Upon opening it. Clear the cache and data.
6. After that Force stop the Google Playstore. And exit the settings.
7. Now Download and install the modded app.