Homegroups (if you mean the same as Windows means with the term) are no longer supported in Windows 10. So be prepared to live without a homegroup.
I doubt if it's related however. Turn all other computers in your homegroup off, and see what happens. If still the same, it's a setting or a program blocking that specific connection and not blocking any other connection.
If you can't find it, go back to factory conditions and it will work again.
Im working with a homegroup and only mu computer has no acces to facebook, Please help me reconnect my computer to the facebook website

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