I can update my system using apt and the Software Updater application on my Ubuntu 21.04 laptop. But I can not longer use the Ubuntu Software application. It keeps telling me "Go online to check for updates" and the update button top left is grayed out. I can install applications with Ubuntu Software. It's only checking for updates that doesn't work. I have checked repositories, even switched to another mirror, but Ubuntu Software still claims I am not online. No other applications have problems with internet connection either.

What can I do to convince Ubuntu Software that I am online so I can use it for update checks? It also checks for firmware updates so I would like to have it working. See screenshot for the error I am getting The Network Settings button does nothing:

There's some other oddities going on with Ubuntu Software application also. If I knew how to reset this application (which is a snap I guess?) to default I'm sure I would solve the problem above also.