Cannot modify header information - headers already sent by (output started at /var/www/html/qtrace-admin/app/Traits/Captcha.php:89)

ErrorException: Cannot modify header information - headers already sent by (output started at /var/www/html/qtrace-admin/app/Traits/Captcha.php:89) in file /var/www/html/qtrace-admin/app/Traits/Captcha.php on line 90 #0 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(255): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError() #1 [internal function]: Illuminate\Foundation\Bootstrap\HandleExceptions->Illuminate\Foundation\Bootstrap\{closure}() #2 /var/www/html/qtrace-admin/app/Traits/Captcha.php(90): header() #3 /var/www/html/qtrace-admin/app/Http/Controllers/CommonController.php(151): App\Http\Controllers\CommonController->phpCaptcha() #4 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(54): App\Http\Controllers\CommonController->reCaptcha() #5 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(43): Illuminate\Routing\Controller->callAction() #6 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Route.php(259): Illuminate\Routing\ControllerDispatcher->dispatch() #7 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Route.php(205): Illuminate\Routing\Route->runController() #8 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Router.php(806): Illuminate\Routing\Route->run() #9 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(144): Illuminate\Routing\Router->Illuminate\Routing\{closure}() #10 /var/www/html/qtrace-admin/app/Http/Middleware/CheckLoginSession.php(34): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #11 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): App\Http\Middleware\CheckLoginSession->handle() #12 /var/www/html/qtrace-admin/app/Http/Middleware/Localization.php(36): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #13 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): App\Http\Middleware\Localization->handle() #14 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(50): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #15 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Routing\Middleware\SubstituteBindings->handle() #16 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php(78): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #17 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle() #18 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php(49): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #19 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\View\Middleware\ShareErrorsFromSession->handle() #20 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(121): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #21 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(64): Illuminate\Session\Middleware\StartSession->handleStatefulRequest() #22 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Session\Middleware\StartSession->handle() #23 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php(37): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #24 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle() #25 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php(67): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #26 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Cookie\Middleware\EncryptCookies->handle() #27 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(119): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #28 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Router.php(805): Illuminate\Pipeline\Pipeline->then() #29 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Router.php(784): Illuminate\Routing\Router->runRouteWithinStack() #30 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Router.php(748): Illuminate\Routing\Router->runRoute() #31 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Routing/Router.php(737): Illuminate\Routing\Router->dispatchToRoute() #32 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(200): Illuminate\Routing\Router->dispatch() #33 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(144): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}() #34 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #35 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle() #36 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull->handle() #37 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #38 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle() #39 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Foundation\Http\Middleware\TrimStrings->handle() #40 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #41 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle() #42 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(99): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #43 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance->handle() #44 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Http/Middleware/HandleCors.php(49): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #45 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Http\Middleware\HandleCors->handle() #46 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php(39): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #47 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\Http\Middleware\TrustProxies->handle() #48 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(119): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #49 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(175): Illuminate\Pipeline\Pipeline->then() #50 /var/www/html/qtrace-admin/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(144): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter() #51 /var/www/html/qtrace-admin/public/index.php(51): Illuminate\Foundation\Http\Kernel->handle() #52 {main}