Lightroom stopped syncing

[pippopoppi]

Hi,

i have an iMac with OS X 10.11.6 (El Captain) and my lightroom, desktop (CC 2015.10.1 [ 1117303 ]) version and mobile version (both iPad and iPhone), stopped sync my photos.

I tried almost everything (uninstall and re-instal desktop and mobile versions), i deleted the collection synced and choose some new. I also tried to log off and in but nothing to do.

Thank you.