Please try switching to another network, such as mobile data; you should be able to log in successfully.
Same issue here on Ubuntu 24
I was able to log in after switching from Wi-Fi to iPhone tethering.
It seemed resolved, but after only ten minutes of use, the issue resurfaced.
The issue appears to be resolved temporarily by changing the IP address and geographic location, but it reoccurs after a few minutes of use.
unfortunately, same. as I said “temp resolved” 
It is happening again.
Yeah, same result. Looks like it’s still not fixed yet.
Not working in chat window, displays
Authentication Required
Please sign in.
maybe we should stop for a while
This is my experience too - you can login via making a US VPN connection. Then you may see some “working” properly but shortly thereafter you will get a “Agent terminated due to error” message. I concluded stopping and waiting a while is the best bet.
same issue, There was an unexpected issue setting up your account .
it works but cant use ai models
i think thats the best thing to do
Okay, thank you for your guidance. I will try and wait for the repair.
我也遇到了这个问题 已经调了快一小时了 仍然无法成功 先是模型加载不出来 导致我以为是账号缓存问题 然后注销账号之后重新授权登录，发现出现了 “There was an unexpected issue setting up your account ”的提示，并且无论尝试多少次都无法成功 即便更换成美国境内的节点也无法生效。这是谷歌自身的问题吗 谁来告诉我 我快要 crazy 了
I have the same. I logged out and I can’t log in again.
I saw this post and it makes sense.