Bug 428960

SUMMARY
After adding the "Network speed" widget to the desktop, it does not display any network read/write info at all, the graph stays flat at none.

STEPS TO REPRODUCE
1. Add the widget to the desktop using right click menu
2. Observe the graph.
3. No graph is being shown.

OBSERVED RESULT
see STR

EXPECTED RESULT
That it would work as it did before in previous versions.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro Linux (Stable)
(available in About System)
KDE Plasma Version: 5.20.2
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1

ADDITIONAL INFORMATION
I had this widget already working on my desktop before the KDE upgrade, but it stopped working.
I even tried to remove and re-add it, but no diff.