Obtaining shared link from VBA (API v2) - 409 Conflict

When supplying the path argument for the file, you do need to supply the full path, including any parent folders. In the sample, the file was presumed to be in the root, but for your case you would need to supply the full "/Desktop Work File/33602DOX.pdf".

Your original code was:

arg = "{"path": "/" & filename & "}"

So, that would need to be something like:

arg = "{"path": "/" & path & "/" & filename & "}"

That should work out to what you have in your followup:

{"path": "/Desktop Work File/33602DOX.pdf"}

Is that also giving the same exact "path/not_found" error? (There are other kinds of path errors.) You should also make sure you're connected to the account you intend.

You can use /2/users/get_current_account to check the account. You can use /2/files/list_folder[/continue] to list the contents of a folder. The API Explorer is also a good way to try out the API.