Fix WordPress 503 Save Error

Job ID: 40175306

Budget: $10 – $30 USD

Each time I hit “Update” on a post or page my WordPress dashboard throws a 503 Service Unavailable response, while every other part of the site runs fine. I have not added or updated any plugins recently, so the usual quick suspects seem unlikely.

I need someone to trace the exact root cause—whether it sits in PHP settings, server-side throttling, an .htaccess rule, core file corruption, or something deeper—and permanently eliminate it. A clean, repeatable fix matters more than a temporary patch.

What success looks like to me:
• Posts and pages save normally without a 503.
• You provide a brief summary of what was wrong and the steps you took so I can avoid a repeat.

I can give full cPanel, SSH, and WordPress admin access if you need it; just let me know which you prefer. Please be comfortable digging through error logs, enabling WP_DEBUG, and rolling back changes safely before going live.