Starting the Action Adapter for SEPM causes the Action Adapter to stop.
2019-05-08 14:54:00,137 [DefaultDispatcher-worker-5] ERROR c.symantec.dx.openc2.adapter.sepm.SepmApi - Exception while authenticating to SEPM server at 'https://sepm.domain.com:8446/sepm/api/v1' with user 'icdxuser': Error: {"errorCode":"500","appErrorCode":"","errorMessage":"Internal Server Error"}
This issue has been mitigated by a workaround built into ICDx 1.3.1 and fully addressed with the SEPM 14.2-RU2 release.