Sorry for asking the obvious, but are you 100% that the filename did not change in the handoff? Assuming the names match up, I don't know why Premiere isn't seeing it the file. But, if you're confident that you know exactly which file you need to relink - uncheck "Display exact matches only" near the search box, select your file, and relink.
It is the same (It was my file I uploaded for him to use). It is also odd, because I cannot dive into sub folders in teh client location on my hard drive - it only shows the root. Had this happen a few times lately with both 2023 and 2024 versions
So did unchecking the "Display exact matches only" box help?
Outside of that, try: restarting Premiere; restarting computer; disconnecting/reconnecting your storage device where the media is located.
Looks like you are on Windows (7? 10? 11?), but I've seen a few posts recommending: cancel out of the link media dialogue (i.e. open your project with media offline), then go to Window > Projects, and make sure the project you are working on is checked. Then try relinking media from your bin/timeline. I'm on Mac so I can't verify if that is a valid fix, sorry in advance if that doesn't help.