error mobile menu

Hey. I get an error in the mobile menu in the Chrome, Opera browsers. Details can be found on the demo site and a screenshot of the errors. When you first visit the site there is no error. When you reload the site, an error occurs.

Demo site: https://astratheme-test.000webhostapp.com

Screenshot No. 1 (no error) – https://ibb.co/sby1RtQ
Screenshot No. 2 (error after reloading the site in the Chrome browser) – https://ibb.co/3zXc2hK

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