for no apparent reason, and when all was working well previously, my data in the admin console for the Weatherflow nodeserver is blank.  when I look in the PG3X, the data is there.  any suggestions?   I appreciate any help!!

The plug-in sends the data to PG3x. If the data is showing up in PG3x and is updating, then the plug-in is working correctly and the problem lies elsewhere. 

If the data is not updating in PG3x, then it is most likely that the WeatherFlow hub is no longer sending out updates or something changed on your network such that the data being sent by the WeatherFlow hub is being blocked.  This assumes you are configured to get data from the hub and not from the WeatherFlow servers.  

If you're configured to get the data from the WeatherFlow servers, then it's likely the requests to the server are failing or the server is failing to respond with any data.

In all cases, the plug-in log file (once switched to debug level) what the plug-in is doing and if it is encountering any issues.