OktaAuth Response in Start Method Closure Not Available

I’m attempting to incorporate the OktaAuth browser login feature into an iOS app that I created in early 2019. The iOS target version is 13.2. In the app code the login() method is executed and works as expected, but when it returns it does not allow me to see the response value that’s in the start() method closure. The error variable is populated if I force an error condition. I’ve tried uninstalling and reinstalling the Okta cocoa pod. The podfile entry is pod ‘OktaAuth’, ‘~> 0.1’

Code snippet:
.start(self) { response, error in … }

Any insights would be appreciated.

Thank you.