Many "operation canceled"/"connection closed" errors during sync

[anon81984126]

Just had a short search after this error with the search function on the top right and stumbled over this:

Not able to login on OC client - but user works fine in browser

I'd also suspect a server/configuration issue. "Operation Canceled" usually means that there was a timeout or some other request failed. You can check your server/PHP/whatever error logs too.