If you are getting the "Please enter a valid WRLD Api key" message, please check the following:
- You have registered at https://accounts.wrld3d.com/users/sign_up
- You have created an API key from this page:
https://mapdesigner.wrld3d.com/portal/latest/dev/

Your API key is not the same as your developer token. You can have many API keys associated to your developer token; in general, you will want a different API key for each application you create using our maps.
Note that the developer token is 80 characters long; an API key is 32 characters.
- Your API key has been added to the WrldMap GameObject, following the instructions at https://wrld3d.com/unity/latest/docs/api/ . You may need to save the project to ensure this change is applied.