Do you know how to fix it?
ePO4.6.1 (build 1192)
Server was restarted several times. McAfeeSupport explained that this will help.
McAfee Support explained that this will help.
What's the error message in the server task log?
In the log it should have a line for the 'Update Master Repository' task which will have a status of 'failed'. Drill down to find the reason why it failed.