iCloud Sync: HTTP/1.1 412 Precondition Failed

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Posts: 5
Joined: Fri Oct 26, 2018 9:24 am

iCloud Sync: HTTP/1.1 412 Precondition Failed

Post by Muggle783 »

Hello everybody,

when syncing iCloud with EssentialPIM, I always get the error message HTTP/1.1 412 Precondition Failed.

I have noticed that the error only occurs when the calendars are synchronized. I disable the synchronization of the calendar and the message does not appear again. I really need the synchronization of the calendars, so disabling is not an option for me.

If I completely delete the iCloud synchronization and set up new, the first sync works without error message.

Thank you for your help!

EssentialPIM Pro 8.1, Lifetime, Windows 10
Posts: 3
Joined: Sat Nov 03, 2018 3:13 am

Re: iCloud Sync: HTTP/1.1 412 Precondition Failed

Post by euijae14 »

I have same situation, too. Sync without calendar worked well, as you said.
But when I delete the icloud sync and re-login again, my first sync showed same error message.
Please help, Thank you.
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