[plugin: wpbook] error posting; facebook (#200)

When I try posting I get this message:
Caught exception in stream publish for user: (#200) This API call requires a valid app_id.Error code: 0

I then ‘checked permissions’ in wpBook settings, got this:
Your userid is 530797976
You will need to enter that number into the WPBook settings page on your WordPress install.
This user_id has granted these permissions:
* offline_access – no
* read_stream – no
* publish_stream – no
This user has NOT set an access_token for the application to use.

Made sure the userid was correct. Checked permissions again which gave same results. On facebook page clicked on “Grant or re-grant permissions for your userid.”
This returned a blank page with this url:
https://www.facebook.com/dialog/oauth?client_id=196215643732917&redirect_uri=https://apps.facebook.com/thesanj/?wp_user=1&scope=offline_access,read_stream,publish_stream

Any advice appreciated. Thanks.

https://www.ads-software.com/extend/plugins/wpbook/