Troubles connecting to the master server

[-NPN-2N3055]

Hello all,

For a couple of weeks I have gotten this error message when trying to update my server list in AC:

"Master server is not replying. Get more information at http://masterserver.cubers.net/"

And my server list remains empty at all times. I am running the Linux version of Assaultcube 1.104. Any help or suggestions would be appreciated.