Version 8 update fails with no active internet reported

I use two instances of charts in my setup. The computer which co-hosts P3Dv5 updated to Version 8 just fine and is working fine. The other computer fails with “Navigraph Charts requires an active internet connection”

The internet connection is 100% ok. It worked fine on the previous version. Both units are running windows 10. The failing unit is Windows 10 Home edition and the working one is Windows 10 Pro in case this is relevant. Both machines are successfully networked to one another and to several other resources such as shared media, printers, etc.

Thanks for your help with this.