Hi @lucyclarespooner,
Are you getting the same error as @vl4d on path /wp-content/plugins/wp-ban/wp-ban.php?
You will have folder /wp-content/plugins/wp-ban/ only if you have installed the plugin wp-ban. If you have not installed this plugin you wont have this folder.
Additionally, there are many reasons for blank page (widely known as White Screen of Death). If you are still receiving blank page in your website, try following suggestions:
1) Memory exhaustion
Memory exhaustion is one of the most common reason behind white screen of death error. To fix this, you will need to increase the memory limit in WordPress. Open wp-config.php file located under WordPress directory, add following line in wp-config.php and save the file.
define('WP_MEMORY_LIMIT', '128M');
If you still get this error after above fix, you will have to extend the PHP memory limit from php.ini file. You can also contact your web host to increase the PHP Memory limit.
2) Try Deactivate All Plugins Through cPanel
Login at cPanel, Under Files section, Go to File Manager.
Select Web Root (public_html/www) and click Go.
Expand the public_html folder, and navigate to the /wp-content/plugins folder.
Right click on the /wp-content/plugins folder and rename it like plugins.old. This will deactivate all of the plugins at once.
Now, reactivate plugins folder again by renaming back to plugins. This will allow you to access the WordPress Dashboard again.
If white screen disappears from your website, activate plugins one by one until the white screen comes back. When it does, you’ll know the culprit plugin.
3) Switch to Default WordPress Theme
If the plugin disabling doesn’t work for you, switch back to default twenty fifteen theme. Access to WordPress directory either through cPanel or FTP, Navigate to wp-content/themes, locate the theme folder you are using and rename it. WordPress will automatically fall back to the default theme.
Hope that helps.
Thanks
