How do you connect to a UE4 server with IPv6?

Development Programming & Scripting C++
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1

I can’t get UE4 to work with IPv6 Im trying to use the command “Open [::1]:17777” to connect to my local editor dedicated server that’s running in PIE. Im able to do this with the IPv4 address but I cant figure out what the engine wants to connect with IPv6

2

Have you solved it？