Firstly, are you using a VPN, or anything else that could potentially be interfering with your connection to our servers?

Secondly, have you made any changes to your computer’s hosts? (C:\Windows\System32\drivers\etc)

Lastly, it’s always worth scanning your PC for viruses and malware.

I should add - if the error is occurring for all of you, and you’re all using the same ISP, I’d recommend that you contact your ISP and explain your connectivity issues to https://5107.playfabapi.com/ . They may be able to identify the issue on their side.