Hello Marianne,
You should make sure your Hotel Booking plugin is up-to-date first in order to be able to update one of its add-ons. Also check that your Hotel Booking and its add-ons licenses are activated. Navigate to Accommodation ->Settings ->License tab for the Hotel Booking plugin license and Accommodation ->Settings ->Extensions ->Desired add-on tab to activate the corresponding add-on license.
Regards,
Andre