The other thing, of course, is to check that you have actually populated the standard clipboard in the way that you intend.
One way of viewing the various types of (textually representable) material in the clipboard is this:
Clipboard Viewer - Macro Library - Keyboard Maestro Discourse
( If, for example, you turn out to be capturing the file path as a public.url or
public.file-url pasteboard item rather than as a public.utf8-plain-text item, then Logic may simply not know how to handle it, and the solution may be a clipboard format conversion )