Cannot sync Lightroom after upgrade

[lmwhiting]

I've just updated Lightroom Classic on my desktop. I now cannot sync any of my collections with Lighroom Mobile. I press the sync button on the sync module and the text goes grey but nothing happens. I'm signed in to Adobe and everything seems to be up-to-date so I'm not sure what's stopping the sync? I've attached a screenshot of the sync module to show how it looks. Any ideas how to resolve this? 

[dj_paige]

Please state the version NUMBER of your operating system. Please state the version NUMBER of your Lightroom Classic. We need the version NUMBER and not words like "latest" or "up-to-date".

[lmwhiting]

My operating system is Mojave 10.14.6 and Lightroom 9.2.1

[josephlavine]

I wonder if your mobile settings lost the link/connection to your catalog since you can only sync to one Catalog. I suggest walking through the steps to sync from your devices as if it was the first time.

Warmly/j

[DdeGannes]

In the current version of Lightroom Classic there is a link to FAQ about sync. It's available at the location where you turn on / off the sync feature. See the screen capture.

[lmwhiting]

Yes, thank you, I've taken a look there already and sadly cannot find a resolution.