My WordPress site’s main navigation menu has suddenly vanished from the front end. Nothing was updated or installed recently, and I have already confirmed that the correct menu is assigned in Appearance → Menus. Cache clearing, plugin deactivation, and theme switching have not been attempted yet; I only verified the menu settings themselves. What I need: • Diagnose the root cause of the missing menu—whether it’s a PHP error, a theme template issue, or CSS/JavaScript that’s hiding it. • Restore the menu so it displays properly on every page, desktop and mobile. • Provide a brief note on what broke and how you fixed it so I can avoid the same issue later. This is a focussed task for someone comfortable with WordPress core files, theme troubleshooting, and browser developer tools. Once you have access, I expect the menu back in place and visible; no redesign or additional styling changes are required unless they directly relate to making it appear again. Please indicate how soon you can start and your estimated turnaround time.