I know this is a pretty old post, but I have been having this problem for some time and finally found a fix and wanted to share it here as well. The problem was Windows cannot identify the Teamviewer network and unidentified networks are automatically set as public. This disables file sharing and I cannot access my computer through Teamviewer VPN. The solution suggested here fixed the problem for me: https://community.teamviewer.com/t5/Ideas/TeamViewer-VPN-Unidentified-network/td-p/46387 Hope this helps somebody.
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