'An Error while retrieving system connection object' appears when trying to log into Web Editor.

'An Error while retrieving system connection object' appears when trying to log into Web Editor.

'An Error while retrieving system connection object' appears when trying to log into Web Editor.

Perform an iisreset on the Web Editor server and delete the Temporary Internet Files and Cookies for Internet Explorer on the client system.

If the issue persists then reboot the client system.

Dassault QA Article #: QA00000021051 deals with this issue.