The box was unticked. I tried " ticking " it and repeated the process which resulted in the same error.
Then I tried " Reset " for all Preferences. I do not know whether it is permanent, but this time Gaussians worked.
The only change is that this time I used the Fedora 34 default wallpaper.
Update :
The Fedora 34 wallpaper is JPG and the earlier image was PNG, which failed again now.
Then I tried " Reset " for all Preferences. I do not know whether it is permanent, but this time Gaussians worked.
The only change is that this time I used the Fedora 34 default wallpaper.
Update :
The Fedora 34 wallpaper is JPG and the earlier image was PNG, which failed again now.