Spy and Record issue with Interstitial popup for sign in

Whentrying to record, the sign in interstitial popup does not appear and cannot log in to the application. On trying the Spy, get a Katlon error “session not created from unexpected alert open: Interstitial popups not supported”. As I am PoC’ing Katalon would be good to get this working as would rule out Katalon from use by the company if cannot be resolved.