Links to old issues broken after upgrade: articleID is missing in URL: /article/view

Hello,
I recently upgraded to OJS3.3.0.4, all is fine except this issue I just noticed, URLs to old published articles (and associated pdfs) are not formatted correctly (the articleID is missing after /article/view/), see attached photo
aem2
You can check on our website directly:

I found the solution here:

Said