Smartthings Integration url

Hi All
I’m new to Home Assistant and have been struggling to set up the Smartthings integration for the last few hours. (Many hours!) I’ve discovered that the url in the Home Assistant Cloud (Nabu Casa) does not match the url I’m presented with when I try to configure the Smartthings Integration in ‘Integrations’. Is this the issue and if so how do I correct it?
Many thanks.