Users are unable to login and the following error is printed in the tomcat-stdOut.log file located in the <APPIAN_HOME>/logs directory:
ERROR com.appiancorp.security.auth.AppianAuthenticationProvider - Error while trying to authenticate the token: com.appiancorp.security.auth.saml.SamlAuthToken@6e1dda2b: Principal: null; Credentials: [PROTECTED]; Authenticated: false; Details: AuthenticationDetails[ts=<time_stamp>, entryPoint=PORTAL, clientIpAddress=<IP_Address>, clientUserAgent=Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Safari/537.36]; Not granted any authorities
org.opensaml.messaging.handler.MessageHandlerException: Signature was either invalid or signing key could not be established as trusted
The following error is displayed on the UI when trying to login:
This issue occurs when the IdP Metadata provided to Appian is invalid.
This article applies to all versions of Appian.
Last Reviewed: May 2019
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