`sudo apt-get update` error

[DanaCoding]

We are happy to answer your questions about the code or discuss technical ideas.

Please complete the following checklist (by adding [x]):

• [x] I have searched open and closed issues for duplicates
• [x] This isn't a feature request
• [x] This is not a report about my app not working as expected

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Hit: 1 http://old.kali.org/kali sana InRelease
Hit: 2 http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease
Ignore: 3 https://repo.protonvpn.com/debian stable InRelease
Ignore: 3 https://repo.protonvpn.com/debian stable InRelease
Ignore: 3 https://repo.protonvpn.com/debian stable InRelease
Error: 3 https://repo.protonvpn.com/debian stable InRelease
   Unable to initiate a connection with repo.protonvpn.com:443 (2001::4a75:b6e3)

[sol8712]

Are you currently connected to the VPN? Probably not related to the ProtonVPN app directly, maybe your isp is blocking connections to protonvpn.com, some countries will do that.

[sol8712]

If you happen to be connecting from a school(or anywhere) in China you will not be able to access protonvpn.com. In fact even talking about a vpn over the Chinese internet can be dangerous.

One of your sources for downloads and updates is "http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease"

This address is a Chinese tech company tied through a government funded school. Also it seems they have a block on protonvpn users connecting to that address.

I highly recommend a new install of your Kali OS from their official site https://www.kali.org/ and ensure the checksum matches your download so you know your installation is not tainted.