Till BC 7.0, by default it uses entrust security provider while creating GS token. If you have added:
java.property.TIBCO_SECURITY_VENDOR=j2se"
property in Administrator.tra that mismatches the security provider used while creating GS token. To overcome this issue you need to use following workaround
1. Stop Admin server
2. Comment java.property.TIBCO_SECURITY_VENDOR=j2se property in Administrator.tra file
3. Restart admin server
4. Recreate GS token
5. Stop Admin server and uncomment a property again and restart.
6. Start the GS engine