Fix WordPress Critical Error

My WordPress site suddenly went down with the “There has been a critical error on this website” message, even though I hadn’t touched any code, themes, or plugins beforehand. Strangely, I can still log in to wp-admin and move around the dashboard just fine, but every front-end page shows the same fatal screen, so visitors see nothing.

What I need from you:
• Pinpoint the root cause of the fatal error (likely a plugin conflict or outdated dependency).
• Safely update all plugins, confirm version compatibility with the current core and PHP.
• Restore full site functionality so every public page loads normally, no warnings, no white screens.
• Provide a brief summary of what went wrong and the fixes you applied so I have a record for future reference.

I can supply WordPress credentials, cPanel/FTP, and a recent backup on request. Please use whatever tools or techniques you prefer (debug mode, WP-CLI, Query Monitor, error logs, etc.) as long as the end result is a stable, fully working site.

Acceptance criteria: the site loads without errors for logged-in and logged-out users, all previously active plugins remain active or are replaced with safe alternatives, and the dashboard stays accessible.

Let me know your turnaround time and any additional details you need to get started.

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來源：Freelancer.com | 出價次數：60 | 剩餘時間：6 日 | 專案類型：固定預算