I have been struggling to fix the navigation at my site discoverhistoricplaces.org.
I created new navigation headings in my dashboard and added them in place of the standard navigation headings. Now I want to delete one of my headings and put "browse collections" back into the navigation but the dashboard won't let me. Every time I try to make a change, regardless of what it is, I get a prompt that says:
"The navigation settings were not saved because of missing or invalid values. All changed values have been restored."
In a field below, it says:
"Navigation links that have undeleteable sublinks cannot be deleted."
I appreciate any help or advice.