[Plone-IT] installazione di zettwerk.ui su plone 4.1

[Tino]

Ho provato ad installare il prodotto zettwerk.ui su Plone 4.1. Quando provo
ad attivarlo ottengo il seguente errore:
Traceback (innermost last):
  Module ZPublisher.Publish, line 126, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module ZPublisher.Publish, line 46, in call_object
  Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 580, in
installProducts
  Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 512, in
installProduct
   - __traceback_info__: ('zettwerk.ui',)
  Module Products.GenericSetup.tool, line 353, in
runAllImportStepsFromProfile
   - __traceback_info__: profile-zettwerk.ui:default
  Module Products.GenericSetup.tool, line 1123, in
_runImportStepsFromContext
  Module Products.GenericSetup.tool, line 1036, in _doRunImportStep
   - __traceback_info__: zettwerk.ui.disable_sunburst_patch
  Module zettwerk.ui.setuphandlers, line 14, in disable_sunburst_patch
AttributeError: 'NoneType' object has no attribute 'setEnabled'

Qualcuno mi può aiutare?



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