I have buy the worldcomposer, and i get a error in unity 5.3.1 .

I have buy the worldcomposer, and i get a error in unity 5.3.1 .

I show the error in the video:

Do you know how can i fix the error?

Thanks in advance.

It says what to do:

You need to create a free Bing key.
Read the WorldComposer manual in the
TerrainComposer folder how to do this.
If you are in Webplayer build mode,
read the troubleshooting in the
WorldComposer manual to get it
working. After you entered the key,
press F5 to refresh. Then press the
“k” button in Map Parameters to hide
the key and this text.

I don’t own WorldComposer nor have ever tried it, so I don’t how to create a key. Read the manual as it suggests and follow the steps.