I have submitted a Single View Swift iOS application to App Store Connect. The application is not Document Based.
The application uploads successfully, but I get the following warning in an email from Apple. I can still test the application through Test Flight, but I want to eliminate the warning.
"Invalid Document Configuration - Document Based Apps should support either the Document Browser (UISupportsDocumentBrowser = YES) or implement Open In Place (LSSupportsOpeningDocumentsInPlace = YES/NO)."
Since your app is not Document based just set
LSSupportsOpeningDocumentsInPlace to NO in your plist. This should resolve the warning.
I had the same problem with the warning from App Store Connect. After changes these two key to NO and resubmitting the error was gone.