Error: IllegalArgumentException: Argument refreshToken is Empty

Issue

Connector setup tests fail with the following error:

java.lang.IllegalArgumentException: Argument "refreshToken" is empty.

Environment

Connector: Google Analytics 4

Resolution

This issue occurs when you attempt to authorize the connection, but another user is logged in to Google Analytics 4 in your current browser session.

To resolve this issue, open a private or incognito window and re-authorize the connector.