Error: Unable to emit response; headers already sent

Notice (8): Trying to get property of non-object [APP/Controller/PagesController.php, line 721]

        $this->set('slowo', $slowo);

        if($slowo->adult == 1){

$slug = 'masz-czy-marz-jak-sie-pisze'
$slowo = null
$query = object(Cake\ORM\Query) {

	'(help)' => 'This is a Query object, to get the results execute or iterate it.',
	'sql' => 'SELECT `Dictionary`.`id` AS `Dictionary__id`, `Dictionary`.`title` AS `Dictionary__title`, `Dictionary`.`seo_title` AS `Dictionary__seo_title`, `Dictionary`.`slug` AS `Dictionary__slug`, `Dictionary`.`category` AS `Dictionary__category`, `Dictionary`.`correct_spelling` AS `Dictionary__correct_spelling`, `Dictionary`.`incorrect_spelling` AS `Dictionary__incorrect_spelling`, `Dictionary`.`context1` AS `Dictionary__context1`, `Dictionary`.`context2` AS `Dictionary__context2`, `Dictionary`.`comment` AS `Dictionary__comment`, `Dictionary`.`created` AS `Dictionary__created`, `Dictionary`.`modified` AS `Dictionary__modified`, `Dictionary`.`adult` AS `Dictionary__adult` FROM `dictionary` `Dictionary` WHERE `slug` = :c0 LIMIT 1',
	'params' => [
		':c0' => [
			[maximum depth reached]
		]
	],
	'defaultTypes' => [
		'Dictionary__id' => 'integer',
		'Dictionary.id' => 'integer',
		'id' => 'integer',
		'Dictionary__title' => 'string',
		'Dictionary.title' => 'string',
		'title' => 'string',
		'Dictionary__seo_title' => 'string',
		'Dictionary.seo_title' => 'string',
		'seo_title' => 'string',
		'Dictionary__slug' => 'string',
		'Dictionary.slug' => 'string',
		'slug' => 'string',
		'Dictionary__category' => 'string',
		'Dictionary.category' => 'string',
		'category' => 'string',
		'Dictionary__correct_spelling' => 'string',
		'Dictionary.correct_spelling' => 'string',
		'correct_spelling' => 'string',
		'Dictionary__incorrect_spelling' => 'string',
		'Dictionary.incorrect_spelling' => 'string',
		'incorrect_spelling' => 'string',
		'Dictionary__context1' => 'string',
		'Dictionary.context1' => 'string',
		'context1' => 'string',
		'Dictionary__context2' => 'string',
		'Dictionary.context2' => 'string',
		'context2' => 'string',
		'Dictionary__comment' => 'text',
		'Dictionary.comment' => 'text',
		'comment' => 'text',
		'Dictionary__created' => 'datetime',
		'Dictionary.created' => 'datetime',
		'created' => 'datetime',
		'Dictionary__modified' => 'datetime',
		'Dictionary.modified' => 'datetime',
		'modified' => 'datetime',
		'Dictionary__adult' => 'boolean',
		'Dictionary.adult' => 'boolean',
		'adult' => 'boolean'
	],
	'decorators' => (int) 1,
	'executed' => true,
	'hydrate' => true,
	'buffered' => true,
	'formatters' => (int) 0,
	'mapReducers' => (int) 0,
	'contain' => [],
	'matching' => [],
	'extraOptions' => [],
	'repository' => object(App\Model\Table\DictionaryTable) {}

}

App\Controller\PagesController::slownikTekst() - APP/Controller/PagesController.php, line 721
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 435
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 122
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 96
Cake\Http\BaseApplication::__invoke() - CORE/src/Http/BaseApplication.php, line 83
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Routing\Middleware\RoutingMiddleware::__invoke() - CORE/src/Routing/Middleware/RoutingMiddleware.php, line 52
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 52
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 82
[main] - ROOT/webroot/index.php, line 43

Notice (8): Trying to get property of non-object [APP/Controller/PagesController.php, line 731]

Code Context

                $this->loadModel('Dictionary');
                $additional_box = $this->Dictionary->find('all', [
                'conditions' => ['category' => $slowo->category],

$slug = 'masz-czy-marz-jak-sie-pisze'
$slowo = null
$query = object(Cake\ORM\Query) {

	'(help)' => 'This is a Query object, to get the results execute or iterate it.',
	'sql' => 'SELECT `Dictionary`.`id` AS `Dictionary__id`, `Dictionary`.`title` AS `Dictionary__title`, `Dictionary`.`seo_title` AS `Dictionary__seo_title`, `Dictionary`.`slug` AS `Dictionary__slug`, `Dictionary`.`category` AS `Dictionary__category`, `Dictionary`.`correct_spelling` AS `Dictionary__correct_spelling`, `Dictionary`.`incorrect_spelling` AS `Dictionary__incorrect_spelling`, `Dictionary`.`context1` AS `Dictionary__context1`, `Dictionary`.`context2` AS `Dictionary__context2`, `Dictionary`.`comment` AS `Dictionary__comment`, `Dictionary`.`created` AS `Dictionary__created`, `Dictionary`.`modified` AS `Dictionary__modified`, `Dictionary`.`adult` AS `Dictionary__adult` FROM `dictionary` `Dictionary` WHERE `slug` = :c0 LIMIT 1',
	'params' => [
		':c0' => [
			[maximum depth reached]
		]
	],
	'defaultTypes' => [
		'Dictionary__id' => 'integer',
		'Dictionary.id' => 'integer',
		'id' => 'integer',
		'Dictionary__title' => 'string',
		'Dictionary.title' => 'string',
		'title' => 'string',
		'Dictionary__seo_title' => 'string',
		'Dictionary.seo_title' => 'string',
		'seo_title' => 'string',
		'Dictionary__slug' => 'string',
		'Dictionary.slug' => 'string',
		'slug' => 'string',
		'Dictionary__category' => 'string',
		'Dictionary.category' => 'string',
		'category' => 'string',
		'Dictionary__correct_spelling' => 'string',
		'Dictionary.correct_spelling' => 'string',
		'correct_spelling' => 'string',
		'Dictionary__incorrect_spelling' => 'string',
		'Dictionary.incorrect_spelling' => 'string',
		'incorrect_spelling' => 'string',
		'Dictionary__context1' => 'string',
		'Dictionary.context1' => 'string',
		'context1' => 'string',
		'Dictionary__context2' => 'string',
		'Dictionary.context2' => 'string',
		'context2' => 'string',
		'Dictionary__comment' => 'text',
		'Dictionary.comment' => 'text',
		'comment' => 'text',
		'Dictionary__created' => 'datetime',
		'Dictionary.created' => 'datetime',
		'created' => 'datetime',
		'Dictionary__modified' => 'datetime',
		'Dictionary.modified' => 'datetime',
		'modified' => 'datetime',
		'Dictionary__adult' => 'boolean',
		'Dictionary.adult' => 'boolean',
		'adult' => 'boolean'
	],
	'decorators' => (int) 1,
	'executed' => true,
	'hydrate' => true,
	'buffered' => true,
	'formatters' => (int) 0,
	'mapReducers' => (int) 0,
	'contain' => [],
	'matching' => [],
	'extraOptions' => [],
	'repository' => object(App\Model\Table\DictionaryTable) {}

}
$additional_box = []
$limit = (int) 32

App\Controller\PagesController::slownikTekst() - APP/Controller/PagesController.php, line 731
Cake\Controller\Controller::invokeAction() - CORE/src/Controller/Controller.php, line 435
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 122
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 96
Cake\Http\BaseApplication::__invoke() - CORE/src/Http/BaseApplication.php, line 83
Cake\Http\Runner::__invoke() - CORE/src/Http/Runner.php, line 65
Cake\Routing\Middleware\RoutingMiddleware::__invoke() - CORE/src/Routing/Middleware/RoutingMiddleware.php, line 52
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 52
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 82
[main] - ROOT/webroot/index.php, line 43

/home/interpunkcjapl/www/vendor/cakephp/cakephp/src/Http/Server.php toggle arguments

	`{`
	`if (!$emitter) {`
	`$emitter = new SapiStreamEmitter();`
	`}`
	`$emitter->emit($response);`
	`}`

	`/**`
	`* Set the application.`

object(Zend\Diactoros\Response) {
	[protected] headers => [
		'Content-Type' => [
			(int) 0 => 'text/html; charset=UTF-8'
		]
	]
	[protected] headerNames => [
		'content-type' => 'Content-Type'
	]
	[private] phrases => [
		(int) 100 => 'Continue',
		(int) 101 => 'Switching Protocols',
		(int) 102 => 'Processing',
		(int) 200 => 'OK',
		(int) 201 => 'Created',
		(int) 202 => 'Accepted',
		(int) 203 => 'Non-Authoritative Information',
		(int) 204 => 'No Content',
		(int) 205 => 'Reset Content',
		(int) 206 => 'Partial Content',
		(int) 207 => 'Multi-status',
		(int) 208 => 'Already Reported',
		(int) 300 => 'Multiple Choices',
		(int) 301 => 'Moved Permanently',
		(int) 302 => 'Found',
		(int) 303 => 'See Other',
		(int) 304 => 'Not Modified',
		(int) 305 => 'Use Proxy',
		(int) 306 => 'Switch Proxy',
		(int) 307 => 'Temporary Redirect',
		(int) 400 => 'Bad Request',
		(int) 401 => 'Unauthorized',
		(int) 402 => 'Payment Required',
		(int) 403 => 'Forbidden',
		(int) 404 => 'Not Found',
		(int) 405 => 'Method Not Allowed',
		(int) 406 => 'Not Acceptable',
		(int) 407 => 'Proxy Authentication Required',
		(int) 408 => 'Request Time-out',
		(int) 409 => 'Conflict',
		(int) 410 => 'Gone',
		(int) 411 => 'Length Required',
		(int) 412 => 'Precondition Failed',
		(int) 413 => 'Request Entity Too Large',
		(int) 414 => 'Request-URI Too Large',
		(int) 415 => 'Unsupported Media Type',
		(int) 416 => 'Requested range not satisfiable',
		(int) 417 => 'Expectation Failed',
		(int) 418 => 'I'm a teapot',
		(int) 422 => 'Unprocessable Entity',
		(int) 423 => 'Locked',
		(int) 424 => 'Failed Dependency',
		(int) 425 => 'Unordered Collection',
		(int) 426 => 'Upgrade Required',
		(int) 428 => 'Precondition Required',
		(int) 429 => 'Too Many Requests',
		(int) 431 => 'Request Header Fields Too Large',
		(int) 451 => 'Unavailable For Legal Reasons',
		(int) 500 => 'Internal Server Error',
		(int) 501 => 'Not Implemented',
		(int) 502 => 'Bad Gateway',
		(int) 503 => 'Service Unavailable',
		(int) 504 => 'Gateway Time-out',
		(int) 505 => 'HTTP Version not supported',
		(int) 506 => 'Variant Also Negotiates',
		(int) 507 => 'Insufficient Storage',
		(int) 508 => 'Loop Detected',
		(int) 511 => 'Network Authentication Required'
	]
	[private] reasonPhrase => ''
	[private] statusCode => (int) 200
	[private] protocol => '1.1'
	[private] stream => object(Zend\Diactoros\Stream) {
		[protected] resource => resource
		[protected] stream => 'php://memory'
	}
}

/home/interpunkcjapl/www/webroot/index.php toggle arguments

	`$server = new Server(new Application(dirname(__DIR__) . '/config'));`

	`// Run the request/response through the application`
	`// and emit the response.`
	`$server->emit($server->run());`

object(Zend\Diactoros\Response) {
	[protected] headers => [
		'Content-Type' => [
			(int) 0 => 'text/html; charset=UTF-8'
		]
	]
	[protected] headerNames => [
		'content-type' => 'Content-Type'
	]
	[private] phrases => [
		(int) 100 => 'Continue',
		(int) 101 => 'Switching Protocols',
		(int) 102 => 'Processing',
		(int) 200 => 'OK',
		(int) 201 => 'Created',
		(int) 202 => 'Accepted',
		(int) 203 => 'Non-Authoritative Information',
		(int) 204 => 'No Content',
		(int) 205 => 'Reset Content',
		(int) 206 => 'Partial Content',
		(int) 207 => 'Multi-status',
		(int) 208 => 'Already Reported',
		(int) 300 => 'Multiple Choices',
		(int) 301 => 'Moved Permanently',
		(int) 302 => 'Found',
		(int) 303 => 'See Other',
		(int) 304 => 'Not Modified',
		(int) 305 => 'Use Proxy',
		(int) 306 => 'Switch Proxy',
		(int) 307 => 'Temporary Redirect',
		(int) 400 => 'Bad Request',
		(int) 401 => 'Unauthorized',
		(int) 402 => 'Payment Required',
		(int) 403 => 'Forbidden',
		(int) 404 => 'Not Found',
		(int) 405 => 'Method Not Allowed',
		(int) 406 => 'Not Acceptable',
		(int) 407 => 'Proxy Authentication Required',
		(int) 408 => 'Request Time-out',
		(int) 409 => 'Conflict',
		(int) 410 => 'Gone',
		(int) 411 => 'Length Required',
		(int) 412 => 'Precondition Failed',
		(int) 413 => 'Request Entity Too Large',
		(int) 414 => 'Request-URI Too Large',
		(int) 415 => 'Unsupported Media Type',
		(int) 416 => 'Requested range not satisfiable',
		(int) 417 => 'Expectation Failed',
		(int) 418 => 'I'm a teapot',
		(int) 422 => 'Unprocessable Entity',
		(int) 423 => 'Locked',
		(int) 424 => 'Failed Dependency',
		(int) 425 => 'Unordered Collection',
		(int) 426 => 'Upgrade Required',
		(int) 428 => 'Precondition Required',
		(int) 429 => 'Too Many Requests',
		(int) 431 => 'Request Header Fields Too Large',
		(int) 451 => 'Unavailable For Legal Reasons',
		(int) 500 => 'Internal Server Error',
		(int) 501 => 'Not Implemented',
		(int) 502 => 'Bad Gateway',
		(int) 503 => 'Service Unavailable',
		(int) 504 => 'Gateway Time-out',
		(int) 505 => 'HTTP Version not supported',
		(int) 506 => 'Variant Also Negotiates',
		(int) 507 => 'Insufficient Storage',
		(int) 508 => 'Loop Detected',
		(int) 511 => 'Network Authentication Required'
	]
	[private] reasonPhrase => ''
	[private] statusCode => (int) 200
	[private] protocol => '1.1'
	[private] stream => object(Zend\Diactoros\Stream) {
		[protected] resource => resource
		[protected] stream => 'php://memory'
	}
}

Could this be caused by using Auto-Tables?

Some of the Table objects in your application were created by instantiating "Cake\ORM\Table" instead of any other specific subclass.

This could be the cause for this exception. Auto-Tables are created for you under the following circumstances:

The class for the specified table does not exist.
The Table was created with a typo: TableRegistry::get('Atricles');
The class file has a typo in the name or incorrect namespace: class Atricles extends Table
The file containing the class has a typo or incorrect casing: Atricles.php
The Table was used using associations but the association has a typo: $this->belongsTo('Atricles')
The table class resides in a Plugin but no plugin notation was used in the association definition.

Please try correcting the issue for the following table aliases:

Sessions

If you want to customize this error message, create src/Template/Error/error500.ctp