Warning: Invalid argument supplied for foreach() in /data/app/vendor/flarum/core/src/Forum/Content/Discussion.php on line 90

Fatal error: Uncaught Laminas\HttpHandlerRunner\Exception\EmitterException: Unable to emit response; headers already sent in /data/app/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php:19 Stack trace: #0 /data/app/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitterTrait.php(36): Laminas\HttpHandlerRunner\Exception\EmitterException::forHeadersSent() #1 /data/app/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitter.php(27): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->assertNoPreviousOutput() #2 /data/app/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(98): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->emit(Object(Laminas\Diactoros\Response\HtmlResponse)) #3 /data/app/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run() #4 /data/app/public/index.php(26): Flarum\Http\Server->listen() #5 {main} thrown in /data/app/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php on line 19