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WordPress repair: errors, white screen and crashes after updates

Is your site showing "There has been a critical error on this website", a white screen, or did the layout fall apart after an update? I find the cause in the logs, not by guessing, and fix it so it doesn't come back.

Most common diagnoses

• Error 500 and the "critical error" after a plugin, theme or PHP update
• White screen of death and an admin area that won't load
• Broken layout, a menu or page builder that stopped working (Elementor, Divi, Gutenberg)
• A form that doesn't send emails
• Redirect loops, database connection errors, memory exhausted
• Errors that appear only sometimes or only for some people

How I proceed

I start by reading: the PHP error log, the server log, the list and versions of plugins, recent changes. I don't change anything on the site at this stage. Often the log already points to the exact file and line where the error occurs.

Then I send a short proposal: what is wrong, how I will fix it, what the risks are, how I will verify the fix and how to roll it back. Only with your approval do I make the fix. Before every change I back up the affected files and the database.

At the end I go through the site in a browser on desktop and mobile, including the cart and checkout for online stores, and send you a clear summary.

Why not just disable plugins

Disabling plugins blindly in bulk may get the site running for a while, but it often breaks something else (orders, forms, SEO) and doesn't reveal the real cause. It's like amputating an arm over a splinter. I'd rather measure where the error comes from and fix exactly that spot.

FAQ

From practice