Hello! I ran into this when I checked “related posts” in the Additional section of the customizer. I tried to publish and it said “Unable to save due to 1 invalid setting.” However, even after I unchecked related posts, it still wouldn’t save and gave me the same error. No matter how I change the settings, same error. Help? (I just made a whole bunch of changes so I don’t even want to leave the customizer and lose them.)
Thank you for your quick response! I deactivated all the plugins and still getting the same error. Does it make a difference if I opened a new tab to deactivate the plugins? If I try to close the customization screen to go to plugins, it says I will lose all of my changes.
After disabling the plugins, you need to reload the customizer page. The setting will probably be gone as the page needs to reload. After disabling all plugins and reloading the page, if the issue still persists, can you provide the login detail to your site at email@example.com?