Site migration, sso error

Does this plugin have any known issues with cloudflare or subdomains? I have this plugin set up on a Dev server and everything is working, but I moved the files,db etc over to the live server. I’ve set up a new client on the parent site with Wp OAuth and updated the client secret, Id, etc but the sso no longer works. The error says “Single Sign On Failed. User mismatch or clash with existing data and SSO can not complete.” I saw in a previous thread that this can sometimes be resolved by removing the user, but this didn’t work and neither did creating a new user on the parent client site and then attempting to login. Any ideas?