Fatal error: Uncaught Error: Failed to create session ID: memcached (path: 574146.heroku.prod.memcachier.com:11211,574145.heroku.prod.memcachier.com:11211) in /app/eventsStore.php:16 Stack trace: #0 /app/eventsStore.php(16): session_start() #1 {main} thrown in /app/eventsStore.php on line 16