blueman-applet crashed with AttributeError in _on_transfer_started(): 'NoneType' object has no attribute 'transfers'

I've transfered about 25 files to my mobile phone and it crashed some time later.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: blueman 2.0.4-1ubuntu3
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic x86_64
ApportVersion: 2.20.6-0ubuntu6
Architecture: amd64
CurrentDesktop: X-Cinnamon
Date: Wed Aug 23 20:54:43 2017
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/blueman-applet
InstallationDate: Installed on 2017-06-22 (62 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
InterpreterPath: /usr/bin/python3.6
ProcCmdline: /usr/bin/python3 /usr/bin/blueman-applet
Python3Details: /usr/bin/python3.6 Python 3.6.2
PythonArgs: ['/usr/bin/blueman-applet']
PythonDetails: /usr/bin/python2.7 Python 2.7.13
SourcePackage: blueman
Title: blueman-applet crashed with AttributeError in _on_transfer_started(): 'NoneType' object has no attribute 'transfers'
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python3/dist-packages/blueman/plugins/applet/TransferService.py", line 180, in _on_transfer_started
     if transfer_path not in self._agent.transfers:
 AttributeError: 'NoneType' object has no attribute 'transfers'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo