Fatal error: Uncaught Error: Interface "Zend\Http\Header\HeaderInterface" not found in /home/rogertabor/public_html/concrete/vendor/zendframework/zend-http/src/Header/ContentSecurityPolicy.php:17 Stack trace: #0 {main} thrown in /home/rogertabor/public_html/concrete/vendor/zendframework/zend-http/src/Header/ContentSecurityPolicy.php on line 17