at first: sorry, i did not read the old postings
go into modules / foldergallery / admin / modify_settings.php
and search for this line's here (~LN 138)
// WB Systemordner sollen nicht angezeigt werden
$invisibleFileNames = array_merge($invisibleFileNames, $wbCoreFolders);
add behind this code in a new line
$invisibleFileNames = array_filter($invisibleFileNames);
this remove the empty array element.
to explain it: the script read's the folder structure from WB and merge this array with the invisible folders in foldergallery-settings. the script know's, there is a folder with name "media", but know's also, "media" is a allowed folder, so it remove the foldername "media" from the array, but leave the key inside.
this filter remove the empty key
P.S.: works also, if you work with pages directory's
the dev's work nearly around the clock on the new wb-version, so normalize no time to build every time a new version for a module, if i have a fix.
i'll read now read the latest postings again, maybe, there are some more problem's