To enable some features of Nucleus, changing file permissions is required. A small guide on how to do this using an FTP client is given below.

First of all, you'll need an FTP client that supports file permission changing. In this example, we'll use CuteFTP. You can download a free trial version if you don't have it.

To change the permissions of a file or directory, create an FTP connection to your website and search for that file or directory in the hierarchy. Select the file by clicking on it.

Open the menu Commands > File Actions > CHMOD... for a file, or Commands > Directory > CHMOD... for a directory.

A window will pop up:

On the bottom, you can enter the code that's given in the documentation (e.g. 755 or 444). Click the OK button and the changes will be applied. You're finished now.