The issue with uk4-vn is now resolved. We have moved the server to a new location.
Unfortunately this has resulted in a permanent IP change. We have updated the DNS so if you use the hostname (uk4-vn.mixstream.net) in your source and links then you don’t need to make any changes.
If you use the IP address (18.104.22.168) in your source or stream links/players then you will need to change it to uk4-vn.mixstream.net or the new IP which is 22.214.171.124
Apologies for the inconvenience caused and thank you for your patience while we dealt with this problem.