Overkiz Somfy invalid authentication

Hey all,

Newbie help requested, please.

Tahoma switch added via the somfy app - all seems good.
Using the integration just get “invalid authentication”. Have tried the gateway pin and local HA IP address. Password/User are correct.
Enabled developer mode on switch and am choosing local IP control.

Probably missing something simple - but any help appreciated.

Do you still face issues? Which hub and region do you use?