2184323 - Validation error getEmailAddress when adding VLS server to a class

Error when adding the VLS option in a class:
 The meeting could not be updated on the VLS server. Please try again later or note the error code and contact your VLS administrator.
 VLS Error Code: java.lang.NullPointerException: while trying to invoke the method java.lang.String.toLowerCase() of an object returned form com.plateausystems.elms.framework.vle.alueobject.VleUserAccountVOX.getEmailAddress()

SAP SucessFactors Learning (LMS)

sap, sf, successfactors, success, factors, learning, lms, Validation, error, getEmailAddress, NullPointerException, kal, kac, java, class, instructor, vls , KBA , LOD-SF-LMS-SCH , Class - Scheduled Offerings , LOD-SF-LMS , Learning Management System , Problem