When logging into Lamannia I get this error after the EULA:
System.ObjectDisposedException: Cannot access a disposed object named "Groupbox" Object name: "GroupBox".
This must be a known error, since a fix is explained in the Turbine Support pages. But not only doesn't the fix (deleting LauncherUserSettings.xml) work for me, but at first the problem occured ONLY for Lamannia. My regular version worked fine.
But I just tried the regular install again, and now it borks at the EULA too.
EDIT: Regular version works now. Lamannia still doesn't.