Fatal error: Uncaught ErrorException: set_exception_handler() expects the argument (Elvanto\Resources\ResponseFormatter::logErrorAndGenerateHtmlResponse) to be a valid callback in /var/www/html/elvanto-bootstrap.php:49 Stack trace: #0 [internal function]: {closure}(2, 'set_exception_h...', '/var/www/html/e...', 49, Array) #1 /var/www/html/elvanto-bootstrap.php(49): set_exception_handler(Array) #2 /var/www/html/public/index.php(3): include('/var/www/html/e...') #3 {main} thrown in /var/www/html/elvanto-bootstrap.php on line 49