Lumia 640 Windows 10 upgrade, why can't I sync the Contacts and Calendar with iCloud?

[Windows Central Question]

Lumia 640 Windows 10 upgrade

My Lumia 640 received the W10 update but will not now sync the Contacts & Calendar with iCloud quoting error code 0x801901f5. Any ideas?

 

[Alexunder93]

Re: Lumia 640 Windows 10 upgrade

Did you try to reset the phone?