In my case, it turned out that the *one* icon giving an error (nm-active-device) was in fact a corrupted PNG file on my system; that is, eog and other programs could not open it. This must have been due to a filesystem error or an interrupted upgrade.
Since other people seem to be experiencing the error, I leave it Confirmed.
In my case, it turned out that the *one* icon giving an error (nm-active-device) was in fact a corrupted PNG file on my system; that is, eog and other programs could not open it. This must have been due to a filesystem error or an interrupted upgrade.
Since other people seem to be experiencing the error, I leave it Confirmed.