@micahg This error comes when either your IP is unstable and changes while you were being authenticated or you have different IP on app and on browser, can you check if you have proxy enabled on browser, or you are using some VPN extension that is causing it to have different IP than app. You can check the IP address used in app by sending GET request to https://postman-echo.com/ip using postman and on browser you can search for What is my IP.
I also get the same error so the post man client not signing in only at my office. I have done the https://app.getpostman.com/dashboard and it resolves my google account and loads in browser but not on the app.
As per some reply I executed the get https://postman-echo.com/ip but no idea what should do with that ip. Is it possible to use that ip on Postman app. I am using Windows 10.
Have you checked your IP address in browser, you can check that by searching for What is My Ip on google. IP address which you get when you send request to https://postman-echo.com/ip using postman should be the same which you get in browser.
Here are the steps I went through to reproduce this issue, which for me was that the login page never opened in the browser.
Sign-out from Postman
Close all Postman tabs in the browser.
Restart Chrome.
Sign in in Postman app.
Only after these steps did the login page open in my browser.
Potentially, the issue could be related to timing out a previous request to login. Both my browser and Postman used the same IP (checked with the get request).