Why is my Ubuntu software not opening?

in a terminal and then re-launching the app solved the problem without a reboot. Then reopen the Software app. If it still doesn’t work you could try reinstalling the Software app. If you’re getting unresponsive search, try reinstalling the software center.

What happened Ubuntu software?

Ubuntu Software Center, or simply Software Center, is a discontinued high-level graphical front end for the APT/dpkg package management system. … Development was ended in 2015 and in Ubuntu 16.04 LTS. It was replaced with GNOME Software.