Zoho Campaign Google Analytics Report - 'Error Occurred. please try again.'

Zoho Campaign Google Analytics Report - 'Error Occurred. please try again.'

Hello,
I am trying to integrate google analytics with Zoho Campaigns.
I am following the guide at:
https://help.zoho.com/portal/en/kb/campaigns/user-guide/reports-and-analytics/articles/google-analytics
I have followed the prompts at Reports > Google Analytics to integrate Google Analytics with my Zoho Campaigns.
When I try to view Reports > Google Analytics, I see the message 'Error Occurred. please try again.' at the top of the screen. It does not display the Google Analytics Reports page.
Is there anything I can do to make this work?