Thanks for reaching out to us regarding this query.
Issues like this usually arise while using versions of the theme that are outdated. Could you please try updating your theme to see if the issue goes away?
This issue may also be caused by a faulty plugin. You may want to disable all your plugins and then check to see if the issue goes away. If it does, please re-enable your plugins one by one to find the plugin that’s causing this issue.
Please let me know if this helps you.