Canon 5D Mk lll, just piked it up, now trying LRC. Not Responding.

[#1]

Just picked up, a canon 5D Mk III. Took a few test pics, now every time I open Lightroom Classic and put a Preset on the picture is automaticlly freezes the program and says (NOT RESPONDING). Am i missing something..? I've imported from a Canon M50 and it was doing fine. anyone know a way to correct this? 

[#2]

Just picked up, a canon 5D Mk III. Took a few test pics, now every time I open Lightroom Classic and put a Preset on the picture is automaticlly freezes the program and says (NOT RESPONDING). Am i missing something..? I've imported from a Canon M50 and it was doing fine. anyone know a way to correct this? 

[#3]

Nelson I have to presume you have successfully imported into LRC from a card or in some other way, but maybe:

"For the 60D, 5D Mark III, and 1D X, a card must be in the camera for tethering to work properly."

This from the Adobe camera compatibility site:

https://helpx.adobe.com/lightroom-classic/kb/tethered-camera-support.html

I realise your question wasn't about tethering though.