Microsoft' Windows 11 updates have broken the "localhost" functionality, making applications that connect back to 127.0.0.1 ...
Microsoft has fixed a known issue breaking HTTP/2 localhost (127.0.0.1) connections and IIS websites after installing recent Windows security updates.
ExtremeTech on MSN
Microsoft Races to Fix Windows 11 Update Bug After Reports of App and Hardware Failures
Microsoft's timing is awkward, as it continues to encourage Windows 10 users to upgrade now that official support has ended.
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