Folks, i upgraded from 4.14 to 5.6 (via appimage) It complained it could not find the existing network collections, an example was: networkshareid:?mountpath=%2Fmnt%2Fmunich%2Fphotos i edited the AlbumRoots table directly converting the ascii %2F to forward slash and then restarted and everything was fine. Its not really clear to me why it was represented in hex in 4.X A local collection did not have same issue and forward slashes were represented directly.
*** This bug has been marked as a duplicate of bug 372047 ***
Fixed with https://bugs.kde.org/show_bug.cgi?id=372047