KB: Sign In button is not active and Error From

Solution Details

If you get this error when Altium Designer tries to sign you in (Altium will try to sign you in at startup if you have enabled "Sign me in when I start Altium Designer"):
 
Error.png

 
Or if the sign in dialog's Sign in button will not activate:
 
signin.png

 
Check Preferences System Account Management Altium Account Management Servers section Location and select portal365.altium.com, then click the OK button

preferences.png

*** Notes:
Versions of Altium Designer 19 and older will have portal2.altium.com in the pull down.

In AD18, the Sign in button will be active always, and you will get the error when you click the button.
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Source URL: https://www.altium.com/documentation/knowledge-base/altium-designer/sign-in-button-is-not-active-and-error-from