Hello
When we inspected your site URL, we found that the trips are being displayed however, there are certain design issues which we have reported to the theme author. The update to the theme for the issues will be out ASAP.
Screenshot : https://nimb.ws/M41LZK
Also, regarding your query about the header image being solid black, please once verify that you have assigned the featured image to individual pages and if you have done so but the issue still persist, kindly write back to us.
Hoping for your kind co-operations.
Feel free to reach us for any further query/confusion.
Regards!