I ran into the same issue after refreshing the API key for Facebook imports. Before the API key refresh, things worked fine. After refreshing the API key, I started running into this error whenever the import ran.
I ended up recreating the import and that got things working again. But that is not an optimal solution, given that I’ve now lost all previous event entries on my calendar.
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This reply was modified 8 years, 8 months ago by
Shahid.