Unable to connect or ping windows hyper-v VM


I have a Windows 2019 VM within a Windows Hyper-V 2019 host. All network connectivity works fine on VM. When installing Zerotier client it does connect and i can approve it in the portal. Portal states the connection as online. I am however unable to ping this host or ping from this host to another ZT host in the same network.
Firewalls are disabled. I suspect it has something to do with the Hyper-V virtual switch? Anyone has recognises these issues and maybe know how to solve these?

Thank you very much.

Problem is eventually solved by reinstalling the zztap300.inf from c:\programdata\zerotier\one\x64

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