Hi, I'm Robinson, and I’m happy to help you today.
I know how frustrating this may be for you but I'll do my very best to help you.
Both errors ERR_NAME_NOT_RESOLVED and DNS_PROBE_FINISHED_NXDOMAIN are associated with problems in the DNS server, the first thing that you can try is to power off your router, wait 5 minutes then turn the router on and try to access the site again, this procedure will force the router get a new a DNS setting from the ISP.
Another option is to set manually the DNS settings.
1-Click on Start then click on Settings
2-Click on Network & Internet
3-Selec the "Ethernet" then click on "Change adapter options"
4-Right-click on the adapter that is connected and select properties.
5-Select the "Internet Protocol version 4" and click properties
6-Change the DNS setting to "Use the following DNS server addresses:
7-Then type the DNS server address:
Google DNS:
Preferred: 8.8.8.8
Alternate: 8.8.4.4
OR
Open DNS:
Preferred: 208.67.220.222
Alternated 208.67.222.220
8-Click on Ok on both windows to save the settings
9-Try to access the site again