FAQ and WP-ecommerce

For help with the plugin, please post on the plugin’s sub-forum:

https://www.ads-software.com/support/plugin/wp-e-commerce#postform

For theme issues, you’ll need to contact the developer of your theme – as commercial themes aren’t supported on these forums:

https://themeforest.net/item/candidate-political-wordpress-theme/2909293

How can I know if it is a theme or plug-in issue?
When I deactivate e-commerce, FAQ starts working again.

In addition to FAQ not working, the slides for the home page do not work either. It remains static on the first slide. This also starts working when WP e-cmmerce is deactivated.

Sounds like you need to ask the developer of your theme – see above.