Traceback (most recent call last):
  File "/usr/bin/beryl-settings", line 324, in PluginButtonClicked
    if not TryEnablePlugin(pld.Plugin):
  File "/usr/bin/beryl-settings", line 256, in TryEnablePlugin
    if (Ctx.Plugin(plugin).Provides.__contains__(feature)):
  File "berylsettings.pyx", line 616, in berylsettings.Context.Plugin
  File "berylsettings.pyx", line 667, in berylsettings.Plugin.__new__
TypeError: expected string or Unicode object, berylsettings.Plugin foun