This may be occurring because an expired access token has broken the connection between Geckoboard and your Google Ads account. To fix this, you'll need to create a new connection.
Before you do so, consider using Google Analytics to show Ads metrics. You'll also have access to far more metrics than our older Google Ads data source.
Click Add widget, located in the top right of your dashboard.
Search for Google Ads using the Search sources field.
Alternatively, you can also scroll down the alphabetical list of integrations until you reach the Google Ads data source.
Click on the Google Ads data source.
Choose from any of the three widgets to reach the widget configuration screen. Now wait for the error to appear and create your new connection.