Hi,
To resolve the issue, please add a new connection in booking connector. For that, pls refer the following steps:
Click on ellipses (...), click on 'Add new connection' menu item:

It will prompt you to sign in to make a new connection.
Once a new connection is created, all the active bookings will be displayed as an option to select in the booking connector:

Select the required booking from the drop down.
If this helps & solves your problem, please remember to give a 👍 and accept my solution as it will help others in the future.
Thanks