Hello @laurenc,
When we inspected your site URL, we did not find the Enquiry div while inspecting.
So please once make sure to enable the Enquiry option by going to Admin Panel > Trips > Settings > Misc. Options.
Screenshots:
https://prnt.sc/ilpdno
Also, the setting to enable the Enquiry option is available in individual trips as well.
If you are not using the global enquiry option then you can enable the enquiry for each trips by going to Admin panel > Trips > All trips and to the individual trips. In Misc. options you can enable the Enquiry option for each trip individually.
Screenshots:
https://prnt.sc/ilpkmx
Even if this process does not help, kindly let us know.
Thank you.
Best Regards!!