Error addClass

Hi,
I have a problem with JS. I don’t see dropdowns at the Organizer and the place. Can you tell me something? Below is an error

Uncaught TypeError: Cannot read property ‘addClass’ of undefined
at Object.t.element (dropdowns.min.js?ver=4.12.7:1)
at HTMLSelectElement.<anonymous> (dropdowns.min.js?ver=4.12.7:1)
at Function.each (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=5.4.2:2)
at a.fn.init.each (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=5.4.2:2)
at Object.t.dropdown (dropdowns.min.js?ver=4.12.7:1)
at a.fn.init.e.fn.tribe_dropdowns (dropdowns.min.js?ver=4.12.7:1)
at HTMLDocument.<anonymous> (dropdowns.min.js?ver=4.12.7:1)
at i (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=5.4.2:2)
at Object.fireWith [as resolveWith] (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=5.4.2:2)
at Function.ready (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=5.4.2:2)