Error message “PVOutput.org update failed: no internet”

Has anyone encountered this error. “PVOutput.org update failed: no internet” I have built a SolarPi from a raspberry pi . The unit has internet connection as I can login to the Raspberry Pi remotely with VNC,
It’s been running fine up until a couple of weeks ago. I checked all setting and all appear ok. So I am baffled. Does anyone know this error ?