Error importing ical feed url into Google Calendar

Error importing ical feed url into Google Calendar

Hi,

I have created an ical feed URL for a view which appears to generate the feed correctly. However, when I attempt to add the URL to Google Calendar the following error is shown:

"Settings Error
Could not fetch the url because robots.txt prevents us from crawling the url."

Can someone please advise where I am going wrong?

Thanks,
Anton