Image corruption

Hi, I have an issue with OneNote where the images in one of my notebooks are corrupted / will not load.  I created the notebook on my MacBook, and the images are still present in OneNote on my MacBook, but when I access the web version of OneNote or the mobile version on iOS or Android, the images are gone, the text is all there, but the images either show a red cross or empty white rectangle.  I have tried syncing from the desktop client, but this doesn’t help.  I have also checked the previous versions / restore on the web version and the images are also missing from those versions.  It is as if they won’t sync from my MacBook to the online version.  Other notebooks are OK.  Any ideas to troubleshoot?

thanks