Problem with Elementor page builder

When Elementor plugin is enabled, even not using inside the page, LearnPress isn’t displaying the lessons and returning the error:

frontend.min.js?ver=1.7.11:2 Uncaught TypeError: Failed to execute ‘getComputedStyle’ on ‘Window’: parameter 1 is not of type ‘Element’.
at Object.getCurrentDeviceMode (frontend.min.js?ver=1.7.11:2)
at u (frontend.min.js?ver=1.7.11:2)
at HTMLDocument.init (frontend.min.js?ver=1.7.11:2)
at i (jquery.js?ver=1.12.4:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4:2)
at Function.ready (jquery.js?ver=1.12.4:2)
at HTMLDocument.K (jquery.js?ver=1.12.4:2)

The page I need help with: [log in to see the link]