UNVERIFIED SOLUTION i
Product Feature: Installation / Upgrade
Installed Designer 6.6 and unable to save a publication. Receive Parse Error, no assembly associated with Xml Key.
The exact cause has never been determined, but most likely is that there were errors during the installation of the Designer 6.6.
ResolutionUPDATED: December 4, 2018
Uninstall EngageOne Designer and re-install.