Missing file on one device only

I used quick capture on my iPhone to add a pdf to Logseq. It was added with no problem. After letting iCloud sync, I checked on my iPad and my Mac. On the iPad, no problem: the pdf is accessible. But on the Mac, the link is there, but then it says “Error: Missing pdf. /link/ Is this the correct path?”
Two problems: first, no way to answer whether it is or not the correct path. Second, it actually is the correct path. I checked the path and the file is there, but Logseq refuses to open it up.
Any thoughts?
Thank you in advance.

This was resolved for a while, but now it is back. Does anyone have an idea? Because of this lack of reliability, I avoid using Logseq, except for pdf annotations, which are unmatched by any other software I have tried.