In the event, you are prompted with the following message:
The fix for this is to completely remove the Google account from our system and re-add it. Please follow the below steps to remove all connection between your Google account and Lumar before adding them again:
1. Go to 'Connected Apps' in the username menu in Lumar.
2. Delete the Google account from the app. Then, please log out from Gmail in your browser and log back in.
3. Go to your Google Account settings (You can access it from your Gmail account, at the top right hand corner).
4. Within 'Security' click on 'Third-party apps & services'
5. Click on 'Lumar (formerly Deepcrawl)' and click 'Remove access'.
6. Finally go back to your Lumar account and add the Google account once again in the 'Connected Apps'.
Another possible reason is that this account might be connected to some other users which can cause an issue with the authorization token. They'd all have to remove the account and reconnect it.
Please note that you will have to reconnect your Google account for each project you are currently running.