PDF opening issues

Hello everyone. I started having serious issues with PDF files opening recently. Corel 2019.

If I drag the file now into corel or import in any other way, it wont open it at all, it would however open kind of a low res thumbnail of that file, not usable. Tried everything already, anyone has any ideas of how to fix this? Attaching a screenshot of that mess. I am pretty hopeless at this moment, would appreciate any help.

P.S: This 2019 version has been a disaster in every way honestly, anyone wants to buy my license lol?

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