@stephane.orluc yeah, i went down that track also to try to figure out if was a user issue, but I can still login using the user / idp initiated sign-on so not sure what it is trying to look up in the journey / sp initiated flow that i am using.
In terms of setup / user store, this is a forgeops install so userstore is DS / OOTB setup with IDM configured in the environment also.
Thanks
Nick