Re-connect to C5 community after changed base URL?
"You must login with a username that is an owner or editor of this project."
Grateful for help!
If not then it is in a different account. Either you know what accounts you have here or somebody else did if for you. But you do need to find that out.
Otherwise you might need to go have a look in your site's database and do a lot of manual fiddling
Seems like the licensing has changed and you can't transfer ..?