Fatal error: Uncaught RuntimeException: Missing or insecure configuration value: RESPONSE_SIGNING_KEY in /home/cdyrbazx/vn-license-server/src/Core/Config.php:52 Stack trace: #0 /home/cdyrbazx/vn-license-server/src/bootstrap.php(39): VNLicense\Core\Config->required('RESPONSE_SIGNIN...') #1 /home/cdyrbazx/vn-license-server/public/index.php(22): require('/home/cdyrbazx/...') #2 {main} thrown in /home/cdyrbazx/vn-license-server/src/Core/Config.php on line 52