Votable Behavior Attribute Error in Plone Classic

Good afternoon, Plone Community!

I am in the process of enabling the votable behavior in Plone Classic as instructed in the Plone 6 training. However, I am getting an attribute error saying it can't set the attribute. The full traceback is below:

Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 162, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 371, in publish_module
  Module ZPublisher.WSGIPublisher, line 274, in publish
  Module ZPublisher.mapply, line 85, in mapply
  Module ZPublisher.WSGIPublisher, line 63, in call_object
  Module plone.z3cform.layout, line 63, in __call__
  Module plone.z3cform.layout, line 47, in update
  Module plone.dexterity.browser.add, line 141, in update
  Module plone.z3cform.fieldsets.extensible, line 65, in update
  Module plone.z3cform.patch, line 30, in GroupForm_update
  Module z3c.form.group, line 145, in update
  Module plone.app.z3cform.csrf, line 22, in execute
  Module z3c.form.action, line 98, in execute
  Module z3c.form.button, line 315, in __call__
  Module z3c.form.button, line 170, in __call__
  Module plone.dexterity.browser.add, line 116, in handleAdd
  Module z3c.form.form, line 263, in createAndAdd
  Module plone.dexterity.browser.add, line 84, in create
  Module plone.dexterity.browser.add, line 200, in _applyChanges
  Module z3c.form.datamanager, line 91, in set
AttributeError: can't set attribute

I have tried reinstalling the Plone site along with the individual custom addons yet the error persists when creating a content type in the custom addon with the votable behavior. What else can be done?

I thank you kindly.



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