Hi,
Please open Hyper-V Manager and select Virtual Switch Manager from the Actions pane. Select the virtual switch, check Allow management operating system to share this network adapter and select OK.
Also, open Network Connections from the start menu on your Hyper-V host and make sure the Hyper-V Virtual Ethernet Adapter is enabled. You can disable/enable the adapter and see if it helps.
If this still does not work, you can remove the current virtual switch and create a new one.
Best Regards,
Ian Xue
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