Solved, but not sure why this occurred. The file webassist/kfm/configuration.php had the wrong name for the connection file. It said localhost.php instead of [my connection name].php and there was no db, username, or password entered below in the KFM configuration nor any adjustment to make the kfm configuration use the values from the connection file. Not sure why, and I could not find any place to adjust these in the HTMLEditor presets.