According to other threads, they're only blocking IP addresses that had previously misused the service or where multiple users connect withbthe sam IP address, and they say they only block it temporarily.
But it happens to too many users reporting these issues. And in my case, it always worked fine until recently, but now a reconnection via a different server in a different country. Hard to believe that out of the sudden many users connect via this service and server.
I'll try using an alternative app; there are a few privacy-minded apps on https://f-droid.org/ in future (FitoTrack and Fast2Fitness both look promising and are available in F-Droid as well as GooglePlay).
