Hello,

I have test your site and noticed that error. I edit the slider “Electronics-2” which you used for your landing page and save the slide and it display the ajax errors in console. Also I test other sliders and they also shown those errors.

Kindly deactivate all the third party plugins and then switch to the parent version of theme and clear your site and browser cache and then check back. This will surely fix the issue.

Best Regards.