Regarding PKP PN not working in ojs

Regarding PKP PN
PKP PN not working properly. After 5 to 7 months of article in PKP PN no preservation is completed. Kindly guide how to solve.
Screenshot is attached herewith.

OJS version:

Hi @National_Journal_of,

I’ve just checked and I can confirm that most of the issues have been preserved, here there’s some context about this error message for you: Plugin PKP PN display - #5 by jonasraoni