Ren'py and Android sometimes don't play well together. The following steps should fix the problem:
1. Backup the existing game files using File Manager or similar.
2. Delete CK completely from your phone.
3. Download and install the new CK update
4. Move the save files from your backed-up copy into the new CK folder (Remember the "persistent" file if you want to keep your gallery unlocks)
5. Play!
NOTE: If you're running Android 11+ then Google has hidden your data folder. To access it you need to connect your phone to your PC with a USB cable or use an app like Solid Explorer or X-Plore to give you access to the folder again.
Your saves are located at:
Android/data/com.domain.corruptedkingdoms/saves
Also, bear in mind that the way Android works you usually need between two to three times as much storage space as the game requires to install it, so if the above doesn't work it may be a storage issue!
Hope that helps :)