you have to edit the app to change max version to allow install.

that does look like a system error. Odd usually those apps let you try to install it

so the phone os. Are you using apk installer by uptodown?

did you do it from a file you downloaded or from a website?

you can install it from the Apkpure website.

it is available on apkpure website. 

do you have the Apk installed?  You can find it on the Apk pure website.

you can find the apk o apk pure website 

My app still works on my S22 Ultra. Although I can't verify my purchase anymore. The Google play store won't let you reinstall it anymore