CSRF constraints violated (4376961)

Error seen in server.log

ERROR [org.owasp.csrfguard.action.Log] (default task-47) Potential cross-site request forgery (CSRF) attack thwarted (user:<anonymous>, ip:198.214.111.1, method:GET, uri:/stat/openCsr, error:Required Token is missing from the Request)
WARN  [org.owasp.csrfguard.CsrfGuardFilter] (default task-47) Invalid request: URI: '/stat/openCsr' | Remote Address: '198.214.111.1'
ERROR [org.owasp.csrfguard.action.Log] (default task-47) Potential cross-site request forgery (CSRF) attack thwarted (user:<anonymous>, ip:198.214.111.1, method:POST, uri:/stat/newCsr, error:Request Token does not match the Master Token)
WARN  [org.owasp.csrfguard.CsrfGuardFilter] (default task-47) Invalid request: URI: '/stat/newCsr' | Remote Address: '198.214.111.1'

Error seen at Web Client login (in browser)