We’d like to add URN to articles in our journal and I am facing a error
On settings, I have defined URN Prefix : urn:cc:4 and use a pattern to URN Suffix : v%vi%ipp%p
Namespace: urn
Resolver URL https://revstat.ine.pt/
I have tested on vol1 and it doesn’t give any error.
https://revstat.ine.pt/urn:cc:4:v1i1pp1-14 … and more 3 articles have this urn recorded.
BUT, this link has this error:
# Not Found
The requested URL /urn:cc:4:v1i1pp1-14 was not found on this server.
What I tried to resolve the issue:
I have already tried to include a more complete url, as in homepage = https://revstat.ine.pt/index.php/REVSTAT/index
Application Version - e.g., OJS 3.1.2:
OJS 3.3.0.7
I appreciate any help 
Example: https://revstat.ine.pt/index.php/REVSTAT/article/view/14
Thank you!