Hey Erin,
Welcome to our premium plugin support forums. Do you get the same result when you export the calendar from Google as an .ics file and import the .ics file using Event Aggregator? (see screenshot below)

Before I’m permitted to test the behavior myself, you’ll need to review our Testing for conflicts guide and reply back with what you find out. If you still experience the error, include the Google Calendar link and I’ll test to see if I get the same issue.
Thanks and have a good evening.