This can happen after you setup IP restriction but forgot to remove IPv6 binding. Add local host (127.0.0.1) to access acceptance list doesn't fix it. Even uncheck using IPv6 in Local Network Connection properties still can't fix it. See pic below:
or clear the access policy settings (you may loose all settings you have done)
Try this simple fix
Open hosts file, add # before ::1 -> save -> work for me!