Hi @paulpegg and @rod_barbee, I’ve found that this was related to a missing honeypot_enabled field in the default database for new Backlight 6 installations.
I’ve made an update to address this. You should see version 8.0.2 for module-admin available. After installing, the next time you add or edit a Contact Form will result in an error “Unable to save changes. Please try again.”.
That error coincides with adding the field. The next and all future edits to Contact Forms should then work. This step is only necessary for new installations made prior to the release of this fix.