I cannot connect to the Anki server on Windows using IPv6

I cannot connect to the Anki server on Windows using IPv6, but IPv4 works fine. I want IPv6 to work too. All the IPv6 checks on the server seem to be normal. Why is the Anki server’s IPv6 not functioning properly?

Upon checking the ports, I noticed that Anki’s IPv6 port 8080 is not open properly. I don’t know what the issue is.

It listens on 0.0.0.0 by default. You may need to change the default.

I tried to change the set SYNC_host =::, IPv6 can be supported, but IPv4 is not supported. How to set it can be supported at the same time?

If :: didn’t work, it may be a problem with the network libraries Anki is using. You might need to stick to either 4 or 6, or using a proxy if you must use both.