NSA325 unable to install metarepository

Hello. I am new to the forum and my knowledge in linux/nas systems is restricted. I have an old NSA325 which I tried to update using the metarepository as I wanted to have more options in the available apps. After download the web_prefix file and retrieving the list from the internet I am on the following screen and I am not sure what to do. Moreover, all the previously installed applications have dissapeared. Any help would be really appreciated. Thank you