Errors & Troubleshooting articles

Errors & Troubleshooting 3,063 Common WordPress errors: white screen, critical error and how to find the cause The site stopped opening and shows a blank white screen, or the line «There has been a critical error on this...
Errors & Troubleshooting 1,267 When a WordPress install fails: the causes and what to do An installer that stops halfway almost always leaves the same clue: the error says where it stopped. It is worth...
Errors & Troubleshooting 1,441 Something has gone wrong with WordPress: where to start WordPress always breaks in the same half a dozen ways. This page exists to save you the searching: find your symptom...
Errors & Troubleshooting 1,236 Giving WordPress more memory The symptom always looks the same: a heavy operation stops halfway, or the page goes blank, and the error log...
Errors & Troubleshooting 1,506 Making WordPress send e-mail properly, with SMTP The site’s form messages never arrive. Password recovery never arrives. Shop notifications never arrive. And there...
Errors & Troubleshooting 1,210 WordPress permalinks and the 404 that follows You changed the permalinks, moved the site or updated something, and now only the home page opens: everything else...
Errors & Troubleshooting 1,019 The “HTTP error” when uploading images to WordPress You drag a photo into the media library, the bar fills up, and at the end it says “HTTP error” and nothing else. The...
Errors & Troubleshooting 958 Mixed content after moving to HTTPS: the padlock that will not turn on The certificate is installed, the site opens on https, and the browser still says “not secure” or shows a padlock...
Errors & Troubleshooting 923 WordPress stuck in maintenance mode The site shows one dry sentence saying it is “briefly unavailable for scheduled maintenance”, and it will not go...
Errors & Troubleshooting 1,135 Raising the WordPress upload limit You try to upload a theme, a backup or a video to WordPress and it answers that the file exceeds the maximum upload...
Errors & Troubleshooting 1,264 WordPress Heartbeat: what it is and why it keeps calling the server The short answer: Heartbeat is a “pulse” that WordPress sends to the server every few seconds while the dashboard or...
Errors & Troubleshooting 1,188 Slimming the WordPress database: revisions, spam and expired transients The short answer: over time the WordPress database fills with things nobody uses any more: revisions of every text,...
Errors & Troubleshooting 1,826 Turning on WordPress debug mode safely: WP_DEBUG and the log The short answer: when the site shows a white page or a “critical error” without saying why, debug mode makes...
Errors & Troubleshooting 1,271 The WordPress password reset e-mail does not arrive The short answer: you pressed “Lost your password?” and the e-mail does not appear. Almost always it is one of three...
Errors & Troubleshooting 1,079 Updating failed in the WordPress editor: the REST API and JSON errors The short answer: you write a post, press Update, and the editor answers “Updating failed. The response is not a...
Errors & Troubleshooting 1,197 The mobile menu does not open on a phone: the usual causes in WordPress and other sites The short answer: on the computer the menu works, but on the phone the three-line button does nothing. Almost always...