Travel WP ISSUES

Hi,
We are having some issues with the TravelWP theme and I dont know how to solve them.

– The only way to add some item to cart is when you are logged with an admin user. We need any user (logged or no) can book tours without problems. In the backend the we have already enable the guest checkout option but nothing change.
– The cart totals is doing wrong calculations:
– The subtotals ALWAYS shows the real amount duplicated (if it’s $10, it’s showing $20).
– The total ALWAYS appears on $0.
– When you book a tour the redirection is not working.

I need the answer as soon as possible.
Thanks!