Notice: Undefined index: HTTP_REFERER

  • Hi there,

    I am using this plugin on multi-site. Sub-site is working fine no issue. But, on main domain domainname.com , it is giving me – Notice:
    Undefined index: HTTP_REFERER in /home/*****/public_html/wp-content/plugins/geographical-redirect/geo-redirect.php on line 37

    error notice. Any help, please?

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

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