Hi @jain034567,
If you’re using OJS 3.1.2-0, you’ll need to apply Revert "#4466 oai links updated" · pkp/pkp-lib@0e21a53 · GitHub to resolve the problem. Note that as far as I’m aware the problem only affects validation tools like Wordcat’s OAI tester; it should not prevent anything from actually using the OAI interface.
Regards,
Alec Smecher
Public Knowledge Project Team