Hello,

I would be grateful for some assistance. I'm trying to add software to this account using the Software App. Some items have installed ok. However, Sound Converter and Sound Juicer won't install giving a message that a third-party repository needs to be added, "debian-stable-main." Mind you, all of the repositories are currently default, meaning the main repository is active. It asks if I want to enable and install. If I click the enable and install button, I get a fail. The message is "E: Could not find the repository."
I don't want to start trying to add repositories haphazardly. Is this a bug? If not, what is the specific repository I need to add?. I went through many explainer videos but did not find any solution .Any advice on adwords would be helpful please as I am fairly new to it. Please help me.

Any help will be appreciated.
Thank you.