single tour error

Hello,

Please check this page from single tour: https://santoriniwonders.com/tours/santorini-sightseeing-tour/

you will see that i cant make the sidebar sticky and the tabs description and itinenary doesnt work correctly, and the booking form and enquiry i have them in tabs but doesnt work too. How i can fix this? please help me because i see that in your demo everything works fine