Fatal error: Uncaught UnexpectedValueException: The current host header value does not match the configured trusted hosts pattern! Check the pattern defined in $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern'] and adapt it, if you want to allow the current host header 'www.hdpolymer.de' for your installation. in /app/source/vendor/typo3/cms-core/Classes/Middleware/VerifyHostHeader.php:47 Stack trace: #0 /app/source/vendor/typo3/cms-core/Classes/Http/MiddlewareDispatcher.php(162): TYPO3\CMS\Core\Middleware\VerifyHostHeader->process(Object(TYPO3\CMS\Core\Http\ServerRequest), Object(Psr\Http\Server\RequestHandlerInterface@anonymous)) #1 /app/source/vendor/typo3/cms-core/Classes/Http/MiddlewareDispatcher.php(70): Psr\Http\Server\RequestHandlerInterface@anonymous->handle(Object(TYPO3\CMS\Core\Http\ServerRequest)) #2 /app/source/vendor/typo3/cms-core/Classes/Http/AbstractApplication.php(87): TYPO3\CMS\Core\Http\MiddlewareDispatcher->handle(Object(TYPO3\CMS\Core\Http\ServerRequest)) #3 /app/source/vendor/typo3/cms-core/Classes/Http/Application.php(44): TYPO3\CMS\Core\Http\AbstractApplication->handle(Object(TYPO3\CMS\Core\Http\ServerRequest)) #4 /app/source/vendor/typo3/cms-core/Classes/Http/AbstractApplication.php(110): TYPO3\CMS\Core\Http\Application->handle(Object(TYPO3\CMS\Core\Http\ServerRequest)) #5 /app/source/public/index.php(20): TYPO3\CMS\Core\Http\AbstractApplication->run() #6 /app/source/public/index.php(21): {closure:/app/source/public/index.php:17}() #7 {main} thrown in /app/source/vendor/typo3/cms-core/Classes/Middleware/VerifyHostHeader.php on line 47