There is a maintained fork of this project at https://github.com/JaapvanEkris/openrowingmonitor
For context, see #175
Various threads mention different branches, pull requests, betas, and branches. This was initially confusing to me.
If you, like me, want to setup a rowing machine, go to https://github.com/JaapvanEkris/openrowingmonitor and use the installation instructions from the README. Use the main branch.