Okular complains that "Some errors were found in the document. Okular might not be able to show the content correctly." in this pdf http://mojave-computing.com/documents/pitch-deck-okular-problems-reported.pdf Online PDF validation tools don't complain. Suggestion: you should have a button showing details of validation errors in Okular. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Frameworks Version: 5.92.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
Okular is not a validation tool, and the PDF is indeed faulty. Personally i don't see anything for us to do here.
It should print what's wrong with it when it complains. This pdf was generated with Goodle Slides.
> It should print what's wrong with it when it complains. That's your opinion, i disagree. > This pdf was generated with Goodle Slides. So what?