TypeError: Cannot read property ‘add’ of null slick.min.js?ver=1.6.0:17

The following shows when trying to edit elementor page. When stylepress is disabled works fine, or stylepress works fine when elementor pro is disabled. Happened just recently with new elementor pro update.

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TypeError: Cannot read property ‘add’ of null slick.min.js?ver=1.6.0:17 Uncaught
Uncaught TypeError: Cannot read property ‘add’ of null
at c.b.initADA (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/lib/slick/slick.min.js?ver=1.6.0:17:18996)
at c.b.init (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/lib/slick/slick.min.js?ver=1.6.0:17:18886)
at new c (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/lib/slick/slick.min.js?ver=1.6.0:17:2931)
at a.fn.init.a.fn.slick (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/lib/slick/slick.min.js?ver=1.6.0:18:9395)
at onInit (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:11538)
at o.function.i.(anonymous function) [as onInit] (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:33019)
at o.trigger (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:32850)
at o.function.i.(anonymous function) [as trigger] (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:33019)
at o.i (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:33111)
at o (https://usssaillinoisbaseball.samplestaging.com/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=1.8.10:2:33297)