Publication Facts Label plugin and Latindex

Hello!

When using the Publication Facts Label plugin in OJS 3.3.0.22, the indexing in Latindex is not shown in the label. When we select “Latindex” in the “Automated Listing of Indexes in the PFL” option in “Settings”, and click on “Save”, the following message pops up in OJS:

Of course we have already checked that the journals are indeed indexed in Latindex, and that the ISSN are the same in OJS and Latindex..

Does anybody know if there is any issue with the “linking” between Publication Facts Label and Latindex, and if there is any way to solve it?

Thank you very much!

Regards,

Joan