When running the installer of UCS@school 4.2 v1 on a slave to create an educational server: (after manually fixing Bug #43711) 03.03.17 11:20:25.393 MODULE ( PROCESS ) : Could not connect to the DC Master m120.uni.dtr: 401 on m120.uni.dtr (auth): {"status": 401, "message": "Cross Site Request Forgery attack detected. Please provide the \"UMCSessionId\" cookie value as HTTP request header \"X-Xsrf-Protection\".", "location": "https://m120.uni.dtr/univention/auth"}
Possibly related: Bug #34498, Bug #39733
*** This bug has been marked as a duplicate of bug 42408 ***
*** This bug has been marked as a duplicate of bug 42114 ***
Fixed in svn r77323.