I’m getting this error: /nas/content/live/manifestcomstg/wp-content is write-able. When finished installing the plugin, change the permissions back to the default: chmod 755 /nas/content/live/manifestcomstg/wp-content . Permissions are currently 775.
W3 Total Cache needs the write permission to your wp-content to complete the installation. In order to be able to finish W3 Total cache needs the permissions to be set to 755.
This is what the notification is telling you and it appears that 755 was your default permission to wp-content.