Error message: Server responded with '400' to operation CalDAVAAccountRefreshQueueOperation. What does this mean and how can I correct it?

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Error message: Server responded with '400' to operation CalDAVAAccountRefreshQueueOperation. What does this mean and how can I correct it?

I operate an iMac - processor 3.2GHz Intel Core i3 - memory 4GB 1333 Mhz DDR3 - operating system OS X Yosemite version 10.10.5.

When opening Calendar I get an error message: "Server responded with '400' to operation CalDAVAAccountRefreshQueueOperation." I don't know what this means or how to correct it.

iMac, OS X Yosemite (10.10.5)

Posted on Sep 5, 2015 1:39 AM

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Answer 1

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Linc Davis

Level 10

209,547 points

Sep 5, 2015 11:20 AM in response to sano saheb

First try a simple fix: back up all data, then delete the calendar account in the Internet Accounts preference pane and add it back. Test. If there's no improvement, restart the computer and try again.

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