Bandwidth monitor shows no data after Fedora upgrade

I run NetWorx 25.11 on a Fedora laptop. Recently upgraded to Fedora 43. The bandwidth monitor no longer shows past measurements and no new data is displayed. It appears to be running the test, but shows no data. Selecting in the data windows does not seem to capture any text, so I do not think this is a white on white font issue.

Any ideas appreciated.

Thanks,
Tom