How to enable Sync

[DestregaEndZz]

For some reason with all my new collections added, i went to use my other machine and noticed they weren't there. In Lightroom it says Sync Disabled with an X and I can't clcik it to re-enable it, it just says Pause Syncing when i hower over it and nothing happens, any help would be much appreciated, thanks.

[99jon]

Are you using Lightroom Classic? It’s only possible to sync one catalog. You enable or pause sync from the activity centre. Hover top-left with your mouse or trackpad cursor and click the small triangle icon that appears – see image below.