En anden mulig løsning er at bruge indstillingen 'debugtoolbar.panels' i din konfigurationsfil til at deaktivere panelet request_vars (som er det, der forårsager problemet):
[app:main]
.. other stuff ...
debugtoolbar.panels =
pyramid_debugtoolbar.panels.versions.VersionDebugPanel
pyramid_debugtoolbar.panels.settings.SettingsDebugPanel
pyramid_debugtoolbar.panels.headers.HeaderDebugPanel
# pyramid_debugtoolbar.panels.request_vars.RequestVarsDebugPanel
pyramid_debugtoolbar.panels.renderings.RenderingsDebugPanel
pyramid_debugtoolbar.panels.logger.LoggingPanel
pyramid_debugtoolbar.panels.performance.PerformanceDebugPanel
pyramid_debugtoolbar.panels.routes.RoutesDebugPanel
pyramid_debugtoolbar.panels.sqla.SQLADebugPanel