Warning: Undefined property: stdClass::$user in /usr/home/serv00/domains/forum.serv00.com/vendor/ianm/syndication/src/Controller/DiscussionsActivityFeedController.php on line 134

Fatal error: Uncaught Laminas\HttpHandlerRunner\Exception\EmitterException: Output has been emitted previously; cannot emit response in /usr/home/serv00/domains/forum.serv00.com/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php:24
Stack trace:
#0 /usr/home/serv00/domains/forum.serv00.com/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitterTrait.php(40): Laminas\HttpHandlerRunner\Exception\EmitterException::forOutputSent()
#1 /usr/home/serv00/domains/forum.serv00.com/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitter.php(27): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->assertNoPreviousOutput()
#2 /usr/home/serv00/domains/forum.serv00.com/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(98): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->emit(Object(Laminas\Diactoros\Response\HtmlResponse))
#3 /usr/home/serv00/domains/forum.serv00.com/vendor/flarum/core/src/Http/Server.php(44): Laminas\HttpHandlerRunner\RequestHandlerRunner->run()
#4 /usr/home/serv00/domains/forum.serv00.com/public/index.php(26): Flarum\Http\Server->listen()
#5 {main}
  thrown in /usr/home/serv00/domains/forum.serv00.com/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php on line 24