Warning (2): Attempt to read property "blog_category_name" on null [APP/Controller/CategoriesController.php, line 26]

        $rotitle = $this->OtBlog->find('all',['contain'=>['OtBlogCategory']])->Where(['bcat_slug'=>$strSlu])->first();
        $pageTitle =$rotitle->blog_category_name;
        $rowPageInfo = 'Category';

App\Controller\CategoriesController::index() - APP/Controller/CategoriesController.php, line 26
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 609
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 120
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 94
Cake\Http\BaseApplication::__invoke() - CORE/src/Http/BaseApplication.php, line 234
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Routing\Middleware\RoutingMiddleware::__invoke() - CORE/src/Routing/Middleware/RoutingMiddleware.php, line 162
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Routing\Middleware\AssetMiddleware::__invoke() - CORE/src/Routing/Middleware/AssetMiddleware.php, line 88
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Error\Middleware\ErrorHandlerMiddleware::__invoke() - CORE/src/Error/Middleware/ErrorHandlerMiddleware.php, line 96
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Http\Runner::run() - CORE/src/Http/Runner.php, line 51
Cake\Http\Server::run() - CORE/src/Http/Server.php, line 97
[main] - ROOT/webroot/index.php, line 40

Warning (512): Unable to emit headers. Headers sent in file=/home/ganeshstone/public_html/vendor/cakephp/cakephp/src/Error/Debugger.php line=856 [CORE/src/Http/ResponseEmitter.php, line 51]

Code Context

            if (Configure::read('debug')) {
                trigger_error($message, E_USER_WARNING);
            } else {

Cake\Http\ResponseEmitter::emit() - CORE/src/Http/ResponseEmitter.php, line 51
Cake\Http\Server::emit() - CORE/src/Http/Server.php, line 140
[main] - ROOT/webroot/index.php, line 40

Warning (2): Cannot modify header information - headers already sent by (output started at /home/ganeshstone/public_html/vendor/cakephp/cakephp/src/Error/Debugger.php:856) [CORE/src/Http/ResponseEmitter.php, line 152]

Code Context

            $response->getStatusCode(),
            ($reasonPhrase ? ' ' . $reasonPhrase : '')
        ));

header - [internal], line ??
Cake\Http\ResponseEmitter::emitStatusLine() - CORE/src/Http/ResponseEmitter.php, line 152
Cake\Http\ResponseEmitter::emit() - CORE/src/Http/ResponseEmitter.php, line 57
Cake\Http\Server::emit() - CORE/src/Http/Server.php, line 140
[main] - ROOT/webroot/index.php, line 40

Code Context

            foreach ($values as $value) {
                header(sprintf(
                    '%s: %s',

header - [internal], line ??
Cake\Http\ResponseEmitter::emitHeaders() - CORE/src/Http/ResponseEmitter.php, line 181
Cake\Http\ResponseEmitter::emit() - CORE/src/Http/ResponseEmitter.php, line 58
Cake\Http\Server::emit() - CORE/src/Http/Server.php, line 140
[main] - ROOT/webroot/index.php, line 40