Reflector returning 5xx errors

[connorhsm]

While no servers online, reflector check is returning 5xx errors. Nginx error.log suspected entries:

PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:0
PHP message: PHP   2. mt_rand() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:340
PHP message: PHP Notice:  Undefined offset: 0 in /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php on line 343
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:0
PHP message: PHP Notice:  Undefined index:  in /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php on line 345
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:0
PHP message: PHP Notice:  Undefined index:  in /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php on line 346
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:0
PHP message: PHP Warning:  mt_rand(): max(-1) is smaller than min(0) in /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php on line 340
PHP message: PHP Stack trace:
PHP message: PHP   1. {main}() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:0
PHP message: PHP   2. mt_rand() /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php:340
PHP message: PHP Notice:  Undefined offset: 0 in /var/www/web.twohoursonelife.com/OneLifeWeb/web/public/reflector/server.php on line 343

This goes on for some time.

Suspecting incorrect setup of PHP 5.6.