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PHP Warningyii\base\ErrorException

Trying to access array offset on value of type bool

$_GET = [
    'category1' => 'wentylacja',
    'category2' => 'kanaly-i-ksztaltki',
    'category3' => 'rury-i-ksztaltki-okragle',
    'product' => 'kdp',
];