nginx — не указан входной файл Ошибка при посещении несуществующих URL с расширениями .php

Возникла проблема с моей конфигурацией NGINX, из-за которой при посещении URL-адреса с расширением .php, который не существует, вместо ответа 404 я получаю «Не указан входной файл». ошибка. Ниже мой конфиг NGINX, есть идеи, что может происходить?

html {
# Compression

# Enable Gzip compressed.
gzip on;

# Enable compression both for HTTP/1.0 and HTTP/1.1.
gzip_http_version 1.1;

# Compression level (1-9).
# 5 is a perfect compromise between size and cpu usage, offering about
# 75% reduction for most ascii files (almost identical to level 9).
gzip_comp_level 5;

# Don't compress anything that's already small and unlikely to shrink much
# if at all (the default is 20 bytes, which is bad as that usually leads to
# larger files after gzipping).
gzip_min_length 128;

# Compress data even for clients that are connecting to us via proxies,
# identified by the "Via" header (required for CloudFront).
gzip_proxied any;

# Tell proxies to cache both the gzipped and regular version of a resource
# whenever the client's Accept-Encoding capabilities header varies;
# Avoids the issue where a non-gzip capable client (which is extremely rare
# today) would display gibberish if their proxy gave them the gzipped version.
gzip_vary on;

# Compress all output labeled with one of the following MIME-types.
gzip_types application/atom+xml application/x-javascript application/javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component;
}

server {
listen 80;
server_name www.example.com example.com;
return 301 https://example.com$request_uri;
}

server {
listen *:443 ssl;
server_name www.example.com;
return https://example.com$request_uri 301;
}

server {
listen 443 ssl;
server_name example.com;
root /home/example/default/public;

index index.html index.htm index.php;

charset utf-8;

location / {
try_files $uri $uri/ /index.php?$query_string;
}

location = /favicon.ico { access_log off; log_not_found off; }
location = /robots.txt  { access_log off; log_not_found off; }

access_log off;
error_log  /var/log/nginx/default-error.log error;

error_page 404 /index.php;

location ~ \.php$ {
fastcgi_param DB_PASSWORD "password";
fastcgi_param DB_USERNAME "user";
fastcgi_param DB_NAME "db";
fastcgi_param DB_HOST "localhost";
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}

location ~ /\.ht {
deny all;
}

# Expire rules for static content

# cache.appcache, your document html and data
location ~* \.(?:manifest|appcache|html?|xml|json)$ {
expires -1;
# access_log logs/static.log; # I don't usually include a static log
}

# Feed
location ~* \.(?:rss|atom)$ {
expires 1h;
add_header Cache-Control "public";
}

# Media: images, icons, video, audio, HTC
location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm|htc)$ {
expires 1M;
access_log off;
add_header Cache-Control "public";
}

# CSS and Javascript
location ~* \.(?:css|js)$ {
expires 1y;
access_log off;
add_header Cache-Control "public";
}
}