If you are being shown a page with this message: "Domain not configured for Shopping Cart functionality", there are two possible reasons for this.
Domain details not entered in the system:
- Login as Admin
- Go to Configuration>>Company Details
- Check that your domain URL is set up there.
You may be accessing the system from behind a proxy server.
This will rewrite URLS for high security environments causing our security to fight with theirs, rendering the cart inaccessible. Hospitals and high security Military operations are common places that may use proxy servers and could cause problems with this.