I have the impression that this is no longer maintained. i tried to follow the "add relay" link and get a 404 error.
Discussion
Just checked and it seems to link you to https://codeberg.org/awm3/pmnr/_edit/main/README.md, which is a README. Wonder if nostr:npub1p47we20qqrn3rcnrhs22ygt2kayk320fq046y998zscq4hk7tgsqjn2qfl knows what's up.