I am getting similar error on AEM 6.3.0 during Sngle Sign-On and login fails and using jdk1.8.0_152. Any help will be appreciated.13.11.2017 20:09:57.314 *ERROR* [qtp483534205-45475] com.adobe.granite.auth.saml.util.SamlReader Document is invalid: no grammar found.13.11.2017 20:09:57.314 *ERROR* [qt...