Page Count Not Working on a Cloud Based Drive

I don't know how Windows consider the synchronized folder, and if it gives a reacheable local path to it...
I mean, it should have a "real" path, something that starts with C:\..., D:\... or whatever.

If you connect a mobile phone to the PC, you can see its content in Windows Explorer but files are accessed through the mtp:// protocol.
In this case, PDFPropertyExtension can't access file content directly.

Please follow these steps:

1. right-click on one of the non-working files, choose Properties and read its full path (Location field)
   Is it a path starting with C:\ ?
   If not, what's the path?
2. copy a file that works to the non working folder, just to be sure that the issue is no file-related
   Does it still not work?