Summary
Error
In /var/opt/OSSM/logs/tomcat_start.log
[16:23:10] [ERROR] -- user_id is required, but null.
[16:23:10] [ERROR] -- Required Parameter Missing: [user_id]. please check the parameters. required: [operation_context], [identifier], [user_id] optional: [target]
Trace Level for tomcat log may be changed at
/var/opt/OSSM/conf /logback-tomcat.xml
Cause
For UOC2 server
/var/opt/uoc2/server/public/conf/config.json: "secret": "A STRING"
and for OSSM Server side
/opt/OSSM/3pps/apache-tomcat-7.0.64/webapps/uoc/WEB-INF/classes/presenter.properties
ossm.jwt_key=TheWalkingSkeleton
the passphrase must be the same
Fix
Update /var/opt/uoc2/server/public/conf/config.json as follows
"secret": "TheWalkingSkeleton"