If "Prevent cross-site tracking" is selected in safari settings, it prevents Google from loading the calendar. You can fix this by doing the following:

  1. Click the "Settings" icon on your iPhone

  2. Scroll to "Safari" and click to adjust the settings for your Safari app

  3. Scroll to "Prevent Cross-Site Tracking"

  4. If "Prevent cross-site tracking" is green, tap to turn off

  5. Refresh your Safari page!

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