IOS/iPhone and Safari on MacOS just show blank pages

Works fine everywhere EXCEPT all I get is blank pages when using any browser on iPhone or using Safari on MacOS.

The pdf was created from a Microsoft Word document which was printed to a PDF file.

Evidently this is an ongoing problem. I see others who reported this issue and in a recent case you ‘optimized’ their pdf for them and it resolved the issue. I need to be able perform whatever optimization you are doing rather than having you optimize it by posting here, since this isn’t workable as an ongoing solution. Would you mind sharing what kind of optimization procedure you use so that we can try it ourselves?

Thanks much.

The page I need help with: [log in to see the link]