Question: Calendar - "The server responded with an error"
I use Calendar and iCloud for years and all was syncing well, on all my devices: iPhone X, MacBook Air and iMac.
Today, I believe since 4 hours ago, I noted changes I made on the iMac Calendar, didn't show on iPhone and I got a message from Calendar: "The server responded with an error".
Well, I thought it could be my iMac, which runs with High Sierra, although it never has shown any problems, so I restarted it but problems remained.
I made the changes on iPhone Calendar, but still no results. No syncing.
I went to MacBook Air and made the Calendar changes there and moments later the same message received in the iMac: "The server responded with an error", thus I understood the problem wasn't on my iMac.
I noted Photos is syncing, but calendar not.
Any suggestion will be very welcome
iMac (21.5-inch, Late 2012), macOS Sierra (10.12.5), Intel Core 2 Duo 2.4GHz, 3 GB RAM, 232 GB HD, plus 2800 GB exte