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由 Yegoriya 发表于 Oct. 22, 2014 · 永久链接

I found the fix
1. delete/remove this add-on
2. use the CalDAV method described here
https://blog.mozilla.org/calendar/2013/09/google-is-changing-the-location-url-of-their-caldav-calendars/

2a. Open the new calendar dialog (File → New → Calendar)
2b. Add a new remote calendar (On the Network → CalDAV)
As a location enter the following, be sure to replace your email address(your-email-address):

https://apidata.googleusercontent.com/caldav/v2/your-email-address/events