Managed to get it to work after some tries. Didn't work to edit /var/lib/snapd/seed/seed.yaml and reboot or reinstall. I had to abort the "doing" "Initialize system state" as PaulW2U wrote.
I run the command
Code:
snap changes
snap abort 1
snap changes
snap tasks 3
1 is the number of the change with status "doing" and 3 is the number of the new "Initialize system state" created by some service.
After aborting the change in "doing" and installation of Communitheme I got
Code:
p-i@pi-GA-990FXA-UD3:~$ snap changes
ID Status Spawn Ready Summary
3 Done today at 15:11 CEST today at 15:12 CEST Initialize system state
4 Done today at 15:19 CEST today at 15:19 CEST Install "communitheme" snap
1 Undone today at 16:28 CEST today at 15:11 CEST Initialize system state
2 Done today at 16:28 CEST today at 16:28 CEST Initialize device
p-i@pi-GA-990FXA-UD3:~$ snap list
Name Version Rev Tracking Developer Notes
communitheme 0.1 465 stable didrocks -
core 16-2.33 4830 stable canonical core
gnome-3-26-1604 3.26.0 64 stable/… canonical -
gnome-calculator 3.28.1 178 stable/… canonical -
gnome-characters 3.28.2 101 stable/… canonical -
gnome-logs 3.28.2 37 stable/… canonical -
gnome-system-monitor 3.26.0 45 stable/… canonical -
gtk-common-themes 0.1 319 stable/… canonical -
Calculator and System Monitor is now working.