Best practice:
Deactivate all your modules also 3rd party menu modules on your installation like SWMenu.
Then unpublish all 3rd party mambots.
If the error still persists you can be sure it is not the modules, but you cannot be sure about the mambots.
You can publish all your modules again.
As to the mambots: You will need to uninstall them one by one and see after each uninstall if the error is still there after clean page reload (best with clean browser cache also).