Changing to a hamburger menu


I have a bloc with a drop-down menu in desktop view but would like to have a hamburger menu in a similar bloc in mobile view. Having created a new Navigation bloc and selected the Menu bric, I set the source to ‘Primary Menu’, Symbol to ‘Standard Hamburger’ and Style to ‘Sidebar Menu’. When I preview the site in mobile view, the menu is still shown as a standard text drop-down list. Am I missing something obvious?

Setting the source to ‘None’ didn’t make any difference.

Any suggestions would be appreciated.



actually i have the same problem. ever found out how to remedy this? thanks.