Windows 11 Upgrade Guide
A possible cause/reason is because the Firewall has had changes made to it in the background, and you are not getting out to the Router to be issued with one by the DHCP part.
This also means a Fixed IP will probably fail similarly.
Windows Defender Security Centre;
Restore Firewall to Default;
Then running the Network Troubleshooter .
Thread is ove 5 years old! folks are gone.
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