Files/Tags are not loaded via MTP

[Enrico]

I use puddletag well on my hard drive, but if I try to load a folder on a MTP drive (my Lumia 640), files are not loaded and nothing is shown on the main screen.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: puddletag 1.0.5-1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Nov 12 20:04:23 2015
InstallationDate: Installed on 2015-10-17 (26 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20151016)
PackageArchitecture: all
SourcePackage: puddletag
UpgradeStatus: No upgrade log present (probably fresh install)