I think someone from the Make team here in the community can raise a ticket or you can create a support ticket for this.
But, to resolve the issue in hand, Can you try using select from the list instead and Map the Database ID there instead of using Enter Manually and see if that resolves the issue you are getting? I don’t have access to Notion so not sure if this works though.
I just wanted to step in and say thanks a lot for bringing this issue to the community @Micmo.
@Runcorn is completely right in here. The best way to report a bug at this moment is to open a support ticket with us. Thanks to that, the team can properly investigate and potentially escalate the issue.
I have been trying to solve the same problem. I think the solution is to add at least one field with the Value Type ‘Title’. That’s the name of the new database entry page. It’s required by Notion’s API but it’s not obvious you need to add it from the dynamic creation widget in Make. This screenshot shows a setting that worked for me.