It was my first time with Reportbug and I didn't use it correctly. So, this afternoon I updated plasma to 5.26 in my debian testing machine and the update went smoothly, but the package "plasma-desktop" was removed from my system. The plasma desktop itself worked, I assume because of the dependencies, but there were some settings missing and most plasmoids weren't working.
The fix is simple: `sudo apt install plasma-desktop`. -- Andrés
