Agree with @RaphaelL If the Security & SD-WAN > Monitor > VPN status page for a given network reports either "NAT type: Unfriendly" or "VPN Registry: Disconnected", there is likely a device upstream of the WAN Appliance for that site that is preventing AutoVPN from working correctly. Perhaps these links below could be of further assistance to you: Site-to-Site VPN Troubleshooting For more information on these two error messages and VPN registry troubleshooting in general, reference our documentation regarding Troubleshooting VPN Registration for Meraki AutoVPN.
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