Can't access OSMC via SSH or FTP - suddenly invalid password?

I’ve never changed my osmc username OR password, and have definitely had access before, but now I want to edit some files and it won’t let me log in… I use ‘ssh osmc@ip.addr.ess’ etc but it says ‘invalid password’ even though there’s no way I would have changed my details. Anyone know how to fix?

Either someone has changed your password for you (accidental port forwarding), which means you should reinstall or you are logging in to the wrong device. Double check the IP