This error happen due to one of the following reasons:
- jQuery option in your modules.
- Your template may use old Bootstrap version.
- Your Joomla 2.5 site doesn't load Mootools.
Yes, you can add multiple polls to one article or multiple modules
(with polls) to one page.
Yes, voters can add their own answers in "Other" answer of Advanced
Poll. You can set these "Other answers" to be published or not.
Poll for J2.5 uses Mootools and Poll for J3.x uses jQuery.
This error happens when you didn't choose poll for Advanced Poll
module.
You should check and set Vote permission for Public user group.
Yes, it's totally possible. Every poll has an option to show the
result normally or on pop-up.