Having trouble checking out an InCopy file.

Hi,

I'm relearning InCopy after a few years ... I'm having an issue checking out a file from a colleague who designed the layout in InDesign. The message says "Unable to check out this file. It may be in use by someone else?" When I go to the "Assignments" panel, it says that the file is in use, and also there is a red question mark indicating that the file can't be found.

I'm unsure if there is something I can do on my end in InCopy? Or if my designer colleague needs to do something in InDesign to allow me access?

Thank you!