check out pages etc not working

Ive just set up this site but the check out page is not working.

1. what pages should be created with woocommerce as I had wp-commerce installed prior and maybe some of the pages were left? I’m not too sure what pages I should have.

2. clicking on add to cart works fine but when I click on checkout, it just shows the page with the shortcode? I do not have “force secure checkout” checked so this is the cause.

Need help urgently. thanks. url https://www.innosensetherapies.com

https://www.ads-software.com/extend/plugins/woocommerce/