Hi. The last batch of articles on OJS has failed to assign DOIs, even though it was all working fine before and afaik nothing has changed in the interim. Seems that the plugin is sending correctly, but failing to register. Failure notification says:
Submission was not successful! The DOI registration server returned an error: '1 - HTTP/1.1 100 Continue
HTTP/1.1 400 Bad Request
date: Tue, 22 Jun 2021 08:48:20 GMT
What should I do to fix this?
Thanks for your help.
OJS is version 22.214.171.124