Starting Fallout 76 Shows “Vault-Tec Engineers Are Hard At Work Getting Our Servers Back Online! (FailedBackend)”

It’s weekend so I wanted to relax. I tried playing Fallout 76 to continue my pending missions. I’ve been playing this game for almost a week now and the game runs fine.

But when I started the game today, this message saying “Vault-Tec engineers are hard at work getting our servers back online! (FailedBackend)” appeared on my screen and I can’t play the game. I tried restarting the computer but no use. Is there a way to fix this?
