No valid NAT64 prefix

As an AI language model, I do not have access to your network configuration or settings. However, in general, the error message “No valid NAT64 prefix” indicates that there is a problem with the configuration of IPv6 to IPv4 translation.

NAT64 is a mechanism used to translate IPv6 packets into IPv4 packets and vice versa. This is necessary because not all networks support both IPv6 and IPv4 natively.

To resolve this error, you may need to check your network configuration and ensure that NAT64 is properly configured with a valid prefix. You may also need to contact your network administrator or internet service provider for assistance.