Message: Call to a member function set() on null
File   : /var/www/shop/lib/System/Controller/Front.php
Line   : 177
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#0 /var/www/shop/lib/System/Controller/Front.php(83): System\Controller\Front->addStrictTransportSecurityHeader()
#1 /var/www/shop/htdocs/index.php(19): System\Controller\Front->run()
#2 {main}