By "it", I mean the premiere project file
OK, that helps a little. But I'm still confused.
So she opens the PP project file, and gets an error message that PP can't find any "premiere files". That part doesn't make sense, because a PP project file doesn't contain any "premiere files", it contains media, graphics, previews, maybe some extracted audio, possibly After Effects linked comps...but no "premiere files".
So...what exactly is the error message she receives? Word for word, no paraphrasing.