Deprecated: json_decode(): Passing null to parameter #1 ($json) of type string is deprecated in /www/wwwroot/mathnerd.cn/vendor/flarum/core/src/Extend/Settings.php on line 115

Fatal error: Uncaught Laminas\HttpHandlerRunner\Exception\EmitterException: Output has been emitted previously; cannot emit response in /www/wwwroot/mathnerd.cn/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php:24 Stack trace: #0 /www/wwwroot/mathnerd.cn/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitterTrait.php(40): Laminas\HttpHandlerRunner\Exception\EmitterException::forOutputSent() #1 /www/wwwroot/mathnerd.cn/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitter.php(27): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->assertNoPreviousOutput() #2 /www/wwwroot/mathnerd.cn/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(98): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->emit() #3 /www/wwwroot/mathnerd.cn/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run() #4 /www/wwwroot/mathnerd.cn/public/index.php(26): Flarum\Http\Server->listen() #5 {main} thrown in /www/wwwroot/mathnerd.cn/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php on line 24