The name org.freedesktop.ModemManager was not provided by any .service files (support ModemManager1 dbus interface)

[Marius B. Kotsbak]

gi._glib.GError: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.ModemManager was not provided by any .service files
Traceback (most recent call last):
  File "/usr/share/prepaid-manager-applet/prepaid-manager-applet.py", line 399, in on_balance_info_renew_clicked
    self.controller.fetch_balance()
  File "/usr/share/prepaid-manager-applet/prepaid-manager-applet.py", line 77, in fetch_balance
    if not self.provider.fetch_balance(self.mm,
AttributeError: 'NoneType' object has no attribute 'fetch_balance'
Traceback (most recent call last):
  File "/usr/share/prepaid-manager-applet/prepaid-manager-applet.py", line 399, in on_balance_info_renew_clicked
    self.controller.fetch_balance()
  File "/usr/share/prepaid-manager-applet/prepaid-manager-applet.py", line 79, in fetch_balance
    error_func=self.on_modem_error):
  File "/usr/share/prepaid-manager-applet/ppm/provider.py", line 80, in fetch_balance
    error_func=error_func)
  File "/usr/share/prepaid-manager-applet/ppm/modemproxy.py", line 82, in wrapped_f
    func(self, *args, **kw)
  File "/usr/share/prepaid-manager-applet/ppm/modemproxy.py", line 157, in ussd_initiate
    None)
TypeError: Argument 4 does not allow None as a value

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: prepaid-manager-applet 0.0.3.1-1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
NonfreeKernelModules: wl nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Aug 3 22:24:59 2014
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20130203-1
InstallationDate: Installed on 2014-03-12 (144 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
PackageArchitecture: all
SourcePackage: prepaid-manager-applet
UpgradeStatus: Upgraded to trusty on 2014-04-22 (103 days ago)

[Marius B. Kotsbak (mariusko)]

It should either support only ModemManager1, or be compatible with both. In the first case, the packaging should be changed to require ModemManager (>=0.7?).