So my guess is that your system is a mix of plasma5 and plasma6 packages breaking plasma. There are a couple of ways to fix this.
- You could try
dnf install task-plasma6
and see all the conflicts. Then run the dnf swap command like before on each of the conflicts listed. I would then run
dnf install task-plasma6
again. Repeat if there are more conflicts.
- You could run
rpm -qa |grep 5.27.11
To get a list of plasma5 packages installed. Remove all these packages and then run
dnf install task-plasma6
NOTE: I would do all of this from a virtual console and not the GUI.
Here is a link to what I had to do.