Since upgrading to the latest version 3.3.0.8 the DOI registration is not working anymore on our OJS website. The new issues do get a doi assigned. But at Medra no new doi’s are registered.
So when you now click on a doi link on our website, you end up with a “DOI not found”
https://doi.org/10.19227/jzar.v9i4.607
The DOI’s from earlier/older issues do still work.