I tried installing Mosaic on a brand new Plone Classic 6.0.0b2 and I'm getting the following error:
(I did pin "plone.app.standardtiles==3.0.0b1" due to this known issue -> Plone 6 Classic with Mosaic - No module named 'plone.app.layout.navigation.defaultpage')
Traceback (innermost last):
Module ZPublisher.WSGIPublisher, line 167, in transaction_pubevents
Module ZPublisher.WSGIPublisher, line 376, in publish_module
Module ZPublisher.WSGIPublisher, line 271, in publish
Module ZPublisher.mapply, line 85, in mapply
Module ZPublisher.WSGIPublisher, line 68, in call_object
Module Products.CMFPlone.controlpanel.browser.quickinstaller, line 544, in __call__
Module Products.CMFPlone.controlpanel.browser.quickinstaller, line 320, in install_product
Module Products.GenericSetup.tool, line 399, in runAllImportStepsFromProfile
- __traceback_info__: profile-plone.app.mosaic:default
Module Products.GenericSetup.tool, line 1511, in _runImportStepsFromContext
Module Products.GenericSetup.tool, line 1323, in _doRunImportStep
- __traceback_info__: plone.app.registry
Module plone.app.registry.exportimport.handler, line 80, in importRegistry
- __traceback_info__: registry.xml
Module plone.app.registry.exportimport.handler, line 125, in importDocument
Module plone.app.registry.exportimport.handler, line 264, in importRecord
- __traceback_info__: record name: plone.lessvariables
ValueError: Cannot find a field for the record plone.lessvariables. Add a <field /> element or reference an interface and field name.
