Note: the recurring booking feature only applies when you are marking a SINGLE cell of the planner screen.
The new/edit booking lateral panel displays a line "Repeat booking" :
Choosing this option leads to a menu where you now specify the type of repetition:
And then, in the following screen, you set up the frequency and the "duration" of the booking to be repeated, either by setting a "end date" or a number of repeated time.
Click on the Save button.
Note: the repeated bookings are now considered as a "group of bookings" and hence when modifying any of them, you will be asked if your change relates to "only this booking" or "all of them".