Aha thanks @dolearning
I have been testing on a free tier tenant to sandbox experimentation from a client’s subscription. I seem to spend way more time than seems reasonable snared up on these kind of minor snags in Auth0 trawling through documentation and community threads!
Cheers
P.S. I attempted to quickly verify on the paid subscription (very carefully!) but unfortunately got a different error which looks configuration related and can’t justify spending any more time on this right now. I’ll endeavour to confirm later and post back.