Hey, this is the first time this issue has been reported.
What Android version are you running?
For now, the only suggestion is to re-download the .apk. Also, make sure you aren't trying to downgrade the app (like going from the H-patch back to the G-patch).
It's a version 11. Looks like it's Arm64 (gods, why does android make it so hard to find this info).
This is the first time I downloaded the app on it ever. I have an older version of gacha cummy on my hentai sdcard, but that has only ever been connected to my laptop.
The tablet is the Samsung Galaxy Tab A SM - T510 if that helps at all.