FormLogin is configured for web application isclite but SSO is not enabled in the global security settings

FormLoginExte E   SECJ0154E: SSO Configuration error. FormLogin is configured for web application isclite but SSO is not enabled in the global security settings.  SSO must be enabled to use FormLogin.
check the security.xml, and found

<singleSignon xmi:id="SingleSignon_1" requiresSSL="false" domainName="" enabled="false"/>

change enabled from false to true, then restart Deployment manager.
<singleSignon xmi:id="SingleSignon_1" requiresSSL="false" domainName="" enabled="true"/>