i noticed in our debug log these errors that keep appearing over and over. I believe that these appear when the cache is cleared. What is this exactly?
[14-May-2019 04:10:10 UTC] PHP Notice: Undefined index: HTTP_HOST in /home/home_site/public_html/wp-content/plugins/wp-fastest-cache/inc/cdn.php on line 137
[14-May-2019 04:10:10 UTC] PHP Notice: Undefined variable: res in /home/home_site/public_html/wp-content/plugins/wp-fastest-cache/inc/cdn.php on line 169
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