Submission was not successful! The DOI registration server returned an error: '1 - HTTP/1.1 100 Continue HTTP/1.1 400 Bad Request server: Apache-Coyote/1.1 crossref-deployment-name: ds5-2 content-length: 0 date: Mon, 14 Jun 2021 05:02:21 GMT permissions-policy: interest-cohort=() connection: close
There is no error in you xml file.
Have you tried to upload this file via https://doi.crossref.org/servlet/useragent ?
You have to login with your username and password and click upload.
Perhaps you could try that and let me know if it works?
And, just a note, that the version of OJS that youâre using (3.1) is no longer supported by PKP. I recommend that you upgrade to the newest version of OJS, as there are some improvements in OJS and the Crossref plugins that you may wish to take advantage of. Along with that, you may wish to upgrade your Crossref plugin.