Have you synced anything from any of your devices using Lightroom?
Is not so, Please, open Lightroom Preferences>Lightroom mobile and select delete all data.
As far as I am aware you require to be using Lightroom CC to use the sync feature. Unfortunately that requires a 64 bit operating system.
Thanks but all data is clear and still no progress.
Thanks! But there is a sync feature in Lightroom 5. And going back - creative cloud was presented with lightroom 5 - there was no lightroom cc at that moment. Just aked Adobe Help Desk, still waiting for their answer.
Ok Adobe help desk just confirmed that Lightroom 5 will not connect to Lightroom mobile. Only Lightroom 6 (cc). Thank you all for your advice!