[Bug]: Failed to reach authentication servers

[STAYoFROSTY]

Possible Fixes

Yes

Modpack Version

1.0.3

What happened?

I've been running the server for around 4-5 days perfectly fine. Yesterday we was hit with the authentication error, and 24 hours later the error is still here.
Things i've tried:

Restarting the server and pc's

Flushing the DNS

Using alternate DNS's

Checked the host file (nothing regarding mojang)

Logging out on our clients

Tried making vanilla servers on the same MC version, and it runs fine. I tried making another ATM9 server and it has the same error.

latest.log

https://gist.github.com/STAYoFROSTY/04a46746e917c43e518e7ee38fbb1e89

Developer reports

No response