access.log:
<domain> 94.225.186.144 – – [19/Sep/2017:18:06:57 +0000] (1 s) “POST /wp-admin/admin-ajax.php HTTP/1.1” 500 531 “https://<domain>/wp-admin/upload.php?page=instant-images” “Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36”
error.log:
[Tue Sep 19 18:05:00.878809 2017] [:error] [pid 65834:tid 3779277604608] (104)Connection reset by peer: [client <ip>:2643] FastCGI: failed to read from backend server, referer: https://<domain>/wp-admin/upload.php?page=instant-images
