I encountered a traceback after I installed Venue [geolocation] and tried to call /@@venue-controlpanel.
Module ZPublisher.Publish, line 138, in publish
Module ZPublisher.mapply, line 77, in mapply
Module ZPublisher.Publish, line 48, in call_object
Module plone.z3cform.layout, line 66, in __call__
Module plone.z3cform.layout, line 60, in update
Module z3c.form.form, line 162, in render
Module zope.browserpage.viewpagetemplatefile, line 51, in __call__
Module zope.pagetemplate.pagetemplate, line 132, in pt_render
Module five.pt.engine, line 98, in __call__
Module z3c.pt.pagetemplate, line 163, in render
Module chameleon.zpt.template, line 261, in render
Module chameleon.template, line 171, in render
Module 2e226ec8d5a364c7bb94a9af6df7cf43.py, line 91, in render
Module 52f963cda721cddd1087a721b7303fc4.py, line 1806, in render_titlelessform
Module 52f963cda721cddd1087a721b7303fc4.py, line 451, in render_fields
Module 52f963cda721cddd1087a721b7303fc4.py, line 126, in render_widget_rendering
Module 52f963cda721cddd1087a721b7303fc4.py, line 1069, in render_field
Module five.pt.expressions, line 161, in __call__
Module Products.Five.browser.metaconfigure, line 485, in __call__
Module zope.browserpage.viewpagetemplatefile, line 83, in __call__
Module zope.browserpage.viewpagetemplatefile, line 51, in __call__
Module zope.pagetemplate.pagetemplate, line 132, in pt_render
Module five.pt.engine, line 98, in __call__
Module z3c.pt.pagetemplate, line 163, in render
Module chameleon.zpt.template, line 261, in render
Module chameleon.template, line 191, in render
Module chameleon.template, line 171, in render
Module b29bad6a2df27580e36641c2d93515e6.py, line 591, in render
Module b29bad6a2df27580e36641c2d93515e6.py, line 466, in render_widget_wrapper
Module five.pt.expressions, line 161, in __call__
Module plone.app.z3cform.widget, line 90, in render
Module plone.app.widgets.base, line 111, in render
Module plone.app.widgets.base, line 102, in update
Module json, line 244, in dumps
Module json.encoder, line 207, in encode
Module json.encoder, line 270, in iterencode
Module json.encoder, line 184, in default