United Airlines and Yelp Apps not opening on iPad Pro 2018

I posted a question about not being able to open the United Airlines app, and I was told to contact the developer. I actually had the same issue with the Yelp app. I received a response from Yelp, and they said they are aware of the problem. They said they thought the problem was with the Apple Smart and/or Magic Keyboard. I disconnected the Smart Keyboard from my iPad Pro 2018, and both the United Airlines app and the Yelp app work just fine. I am posting this as others may have the same issue.