Authentication servers are down

I've got a small raspberry pi spigot server which has been running for about a month now without any problems. However, I recently moved apartments and switched internet providers, and I'm having trouble making the server public again (Xfinity is hot garbage). "Okay, fine. At least I can still play locally!" I said optimistically. Except, when I try to hop on the server over a wired connection (using 'raspberrypi.local' as the server IP address), during the "Encrypting..." step, I get the following error message:

"""
Failed to connect to server

Authentication servers are down. Please try again later, sorry!
"""

I've been able to sign on locally before. Any idea what the problem might be?
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