Salesforce connected app deployment

I'm trying to connect our Salesforce sandbox to the Copilot Sales app. I was able to log in and I can see the connected app and Copilot for Sales Integration User, but no permission sets. When the log in pop-up closes upon log-in, the Sales settings show that Salesforce is disconnected and when I reconnect, I see this error message: "Couldn’t complete the connected app deployment to Salesforce. Try again."

I uninstalled the connected app in SF and started the process again and am getting the same results. What should I do to successfully connect Salesforce sandbox to Copilot for Sales?