Issue
After editing an Update Manager's configuration and then clicking OK, Enterprise Console crashes.
Known to apply to the following Sophos product and version:
Enterprise Console, version 4
What to do
This error occurs when you add a description to the default distribution.
Re-open Enterprise Console and edit the Update Manager, leaving the description field in the default distribution blank.
This is a known issue, which was fixed in Enterprise Console, version 4.5.