WordPress Installations Scan finds 4 unidentified WP installations

Hello Community

The Plesk WordPress Installations Scan returns x4 installations with no details (ie. a name of '/httpdocs' but no URL, themes, plugin details etc.)

The does return x15 other installations correctly.

I can account for two of the installations as they are missing from the list of 15. Perhaps each is being duplicated?

Has anybody else fixed this problem?
Thanks