Fatal error: Uncaught RuntimeException: Output has been emitted previously; cannot emit response in /var/www/vhosts/myelimu.com/public_html/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php:41 Stack trace: #0 /var/www/vhosts/myelimu.com/public_html/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php(30): Zend\Diactoros\Response\SapiEmitter->assertNoPreviousOutput() #1 /var/www/vhosts/myelimu.com/public_html/vendor/zendframework/zend-diactoros/src/Server.php(167): Zend\Diactoros\Response\SapiEmitter->emit(Object(Zend\Diactoros\Response)) #2 /var/www/vhosts/myelimu.com/public_html/vendor/flarum/core/src/Http/AbstractServer.php(36): Zend\Diactoros\Server->listen(Object(Zend\Stratigility\NoopFinalHandler)) #3 /var/www/vhosts/myelimu.com/public_html/index.php(20): Flarum\Http\AbstractServer->listen() #4 {main} thrown in /var/www/vhosts/myelimu.com/public_html/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php on line 41