After upgrading to Moodle 3.11 I am no longer able to delete appointment slots using the trash bin icon or any of the options from the "Delete slots" menu. Javascript console shows "Uncaught TypeError: M.mod_scheduler is undefined" so I expect that all the JS events are failing to execute. I believe that since 3.10 all javascript modules must be written in ES6 (https://tracker.moodle.org/browse/MDLSITE-6130) so this is most likely due to that restriction.

Right clicking the links and opening in a new tab works (although not for "Delete selected slots" due to not passing form information when opening a link through that methodology).