Hello @MarkAGregory,
at the end of the contributor edit form there should be a check box called “Delete ORCID iD and access token” . Check this and save the form. This should delete all ORCID related information from the contributor.
You could also use the other checkbox "Send e-mail to request ORCID authorization from contributor " to try the authorization process again. Please try it again and if you are able to look into the PHP error log or the file "orcid.log " in the OJS files directory, after the contributor has clicked the authorization link. Please watch out for any errors logged during the time the contributor went through the authorization process (clicked the link in the e-mail, logged in with ORCID credentials and is redirected to your jounals website).
I need to more information to track this one down.
Regards,
Nils Weiher