SmartThings integration

I’m attempting to integrate Home Assistant with SmartThings. I’ve created the Samsung/SmartThings access token, and when I provide it to the HA Integrations setup process on the web frontend, it works. I get prompted to “Install the Home Assistant SmartApp in at least one location”, and I open SmartThings Classic on my mobile and begin to do so. When I select Home Assistant, I get an error saying “Something went wrong” - there is no additional detail. I have a Home Assistant SmartApp listed on my SmartThings automation window, but when I click on it I get a screen saying “Something’s Wrong / We can’t load your screen right now”. I have tried removing the SmartApp and restarting the process multiple times, always with the same results. Help, please?