All installed years of Lacerte will no longer start. Instead, I get "Exception EDOMParseError in module xmlrt190.bpl at 0002F20D. An invalid character was found in text content."

Server went down and a new server has been installed, backup restored. This error appears on both workstations when trying to start Lacerte. Have tried a force update on a workstation, did not help.

Any thoughts would be appreciated?