LTI between Opencast and Moodle does not work

Steps to reproduce: 1. Configure Opencast for LTI as documented 2. Configure Moodle as LTI consumer 3. Trying to display the Opencast content through LTI    Actual Results:  Server error 500 on the Opencast server "HTTP ERROR 500 Problem accessing /lti. Reason:     Server Error Caused by: java.lang.IllegalArgumentException: Cannot pass null or empty values to constructor at org.springframework.security.core.userdetails.User.<init>(User.java:99) at org.opencastproject.kernel.security.LtiLaunchAuthenticationHandler.createAuthentication(LtiLaunchAuthenticationHandler.java:194)"... Details at: https://groups.google.com/a/opencast.org/d/msg/users/ieBgnSAfo1E/tI_YnclrAwAJ    Expected Results:  Opencast displaying player or episode selection for series    Workaround (if any):  Change code in org.opencastproject.kernel.security.LtiLaunchAuthenticationHandler: - if (StringUtils.isNotBlank(suppliedEid)) { + if (suppliedEid != null && !suppliedEid.isEmpty()) {