wooptoo

The following folders have to be chmod-ed to 777 (readable/writable/executable by all users) for wp-cache to work:

wp-content
wp-content/cache

You can do this from your host’s cpanel or webftp.

If it doesn’t work you can try chmod-ing these too:

wp-content/plugins
wp-content/plugins/wp-cache

Create a file named unlink.php in your wp-content folder with this in it:

<?php unlink("cache/wp_cache_mutex.lock"); ?>

Then access it from the browser: https://yoursite.com/wp-content/unlink.php

It will unlink the cache/wp_cache_mutex.lock, so you can delete the folder. You can delete unlink.php afterwards.

Create a file named symlink.php in your wp-content folder with this in it:

<?php symlink("plugins/wp-cache/wp-cache-phase1.php","advanced-cache.php"); ?>

Then access it from the browser: https://yoursite.com/wp-content/symlink.php

It will create your symlink. You can delete it afterwards.