Fusion Builder not installing

We are using the Avada theme- when we try to install Fusion Builder we get this error:

Could not copy file. fusion-builder/inc/lib/inc/redux/framework/FusionReduxCore/framework.php

Fusion Builder installation failed. The update procedure could not delete the plugin due to a permissions issue on your server. Please ask your hosting provider to check the permissions level or manually remove the plugin via FTP or WordPress before attempting to reinstall it.

Is there another way to install it? Thank you.

if your website already exist Fusion Builder plugin folder then you have to remove the folder first from plugin directory then you will be able to install. otherwise youcan use ftp to replace the existing one. Thanks