Why can't I revise or cancel a booking, while I was able to do so yesterday?

There are edit/cancel deadlines for Air/Ocean shipments.

Air shipment, once the milestone "Booking Confirmed" is triggered, you cannot edit/cancel the booking via the platform.

Ocean shipment, there is a terminal cut-off date on the shipment content page. Once the date has passed, you cannot edit/cancel the booking either.

Moreover, you can directly contact your dedicated operators to see if they can assist you with making changes.