Thank you kindly for your advice. All is now importing properly now that I've upgraded to the Creative Cloud version..
Thank you again,
If you had Lightroom 6 installed, it wasn't necessary for you to switch to the creative cloud. All you needed to do was install the updates for Lightroom 6.
Please follow the below steps to convert Lightroom CC 2015 to Lightroom 6.
> Quit Lightroom
> Sign out from Creative Cloud
> Launch Lightroom
> It will ask you to sign in and enter the serial number to activate your product.
Hope this helps.
Thank you, Jim.
Thank you for your advice, Mrinmay.