The project is not displayed with Android - Error when trying to open a previously made project.

I'm working on a project to install objects in my city using geolocation. I'm doing it, I went with my phone and I see it (with difficulties, because I start recording and it disappears, I restart the app and sometimes it appears, it's not a very natural and fluid experience). One of the points is that only some Apple phones see it, with Android you can't see it??? The other point is that when I go back to edit the project... I get an error "the project could not be opened" what could be happening? Does anyone have any idea? Thanks a lot!