Email the developer and ask if (and if so, when) they plan on coming out with a version that will run in Android 8.
There's no "legacy enabler" possibility - either something was dropped from the new version of Android, something was changed, or the developer, in order to not get complaints of the app not working properly, has it checking the Android version and, if it's greater than 7, the app simply quits. (If you're a good Java developer, you could look in the app's apk file and see where the problem occurs and write a patch for it - but if you could, you probably would have already.)
09-13-2017 12:40 PM