Last week, several of the sites I work with began showing a "Not Found" error on whatever static page is set to display as the front page (under the Reading settings). I haven't made any changes to these sites recently.
While the main page displays a "Not Found" error, the rest of the site still works without problem. Similarly, I get the same error regardless of which page is designated as the main page.
The permalinks are set to default, and I've tried disabling all plugins--the error persists. Does anyone have any thoughts on things I can try? Thanks!
Two pages this is happening on: