InDesign is not finding other missing links in a folder. I have only Illustrator files stored I a folder titled 'Illustrator', which is a subfolder of another folder titled 'Content'. The Indesign file sits at the same level as this 'Content' folder.

There are over 100 Illustrator files in the folder, some with single artboards and some with multiple, and some are placed in multiple locations in the InDesign file.

InDesign as no problem finding other missing links in other folders (titled Photoshop, PDF) which sit at the same level as the Illustrator folder.