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If your site is suddenly just a blank white screen, it's likely due to a plugin, theme, or database error. More specifically, you've probably run out of memory because a plugin or theme is poorly coded and trying to use too many resources on your server. Rarely, it could be a problem with your hosting.
How you fix the white screen of death will vary depending on whether you have access to your WordPress dashboard or not. You'll need to troubleshoot both your theme and plugins, disabling them all and enabling them one by one until you identify the culprit. As a last resort, you may need to install WP again.
If you're using any caching plugin, first flush and clear that out to see if that's causing the white screen.
Step 1: Go to plugins and disable them all
Step 2: Enable them one by one, checking to see if the problem is fixed between each one.
Step 3: If a problem plugin isn't found, change your theme to the default WP theme and see if it solves the problem (If it does, look at the functions.php file and make sure there are no extra spaces in the code of the theme you were using)
Access your site through FTP or go to the File Manager in cPanel, then perform the following steps:
Step 1: Go to the folder where WordPress is installed
Step 2: Go to the wp-content folder
Step 3: Find and rename the plugins folder from plugins to plugins.old
Step 4: See if the problem is fixed (If it is, there's a problem with a plugin)
Step 1: Rename plugins folder back to the original name (plugins)
Step 2: Go in that plugins folder
Step 3: Rename plugins one by one from plugin-name to plugin-name.old, checking to see if the problem is fixed between each one until you find it
Step 1: Access your site through FTP or go to the File Manager in cPanel
Step 2: Go to the folder where WordPress is installed
Step 3: Go to the wp-content folder
Step 4: Go to the themes folder.
Step 5: Make sure you have the default WP theme installed
Step 6: Rename your current theme, and WP will automatically divert to using the default theme.
Step 7: See if the problem is fixed
Step 8: If so, it's your theme causing it. If not, rename it back to the original name
If it still isn't fixed, you can try increasing the memory limit for your site.
Step 1: Go to cPanel
Step 2: Go to File Manage
Step 3: Go to the folder where WordPress is installed
Step 4: Download a copy of your wp-config file to have a backup
Step 5: Edit the wp-config file by adding this:
If you're on a cloud or dedicated server, as a last resort, you can reboot the server to see if this corrects the issue, as this will refresh your system resources.
If your site still does not have enough memory, you may be required to upgrade to a package or service with the necessary memory to run your website. We have a guide on How to Upgrade Your Web Hosting and a guide on Upgrade Your Server Instance.
Written by Michael Brower / December 13, 2016