due to the new google play requirements that all apps should target API level 26, also affirmed that targetting API level 26(Android 8) will also work on previous versions of android.
when i create an App with Makedroid with a target of android 8. the app doesn’t works on previous versions.
Unfortunately you are changing the min sdk to 26 and the target sdk which is required for google play store is already set when apps are build. So set the min sdk to 16 which is the lowest available in makeroid so that apps with lower versions can run it.