The ProtonVPN Korean server will be shut down for a couple of days to perform a hardware intervention. Service on the Korean server will resume as soon as the scheduled maintenance is over. Other servers should not be affected.
We apologize for the inconvenience and we thank you for your understanding.
If you have questions or encounter issues with the other ProtonVPN servers, please don't hesitate to contact us at protonvpn.com/support-form
Regards, The ProtonVPN Team