Add the following (in red) to the .htaccess file:

RewriteEngine On
RewriteRule .* – [E=noabort:1]
RewriteRule .* – [E=noconntimeout:1]

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
php_value max_execution_time 120

# END WordPress