Hi, sorry for waiting, I was flying around the universe, but luckily Tonio has direct link to me. He wrote me today "Houston, We've Got a Problem". So I am back
Now your problem:
Android makes a lot of changes every new version. You must sepecify a loto of Andrpoid variables. One of them is called targetSdkVersion. It was set to 10 Gingerbread. So if you use application on android Oreo (where was mock location changes), Android Oreo must simulate Gingerbread. But Android also changed Google Play, so each application must now set targetSdkVersion=26 (Oreo). So I cannot upload application with targetSdkVersion=10.
So I decided to make this application free. You can download old version here. Before installation you must uninstall Google Play version.