Widget Factory Facebook Error

[Michael Pusch 15]

Integrated a widget called "Referenzen" in a facebook tab and it's working fine on this page:

 

https://www.facebook.com/KuechenBrunsmann/app/580579942137587/

 

But it don't appears on this page:

 

https://www.facebook.com/CAD.Raumdesign/app/580579942137587/

 

The error:

 

Error: 0

Unsupported get request. Object with ID '291912527528235' does not exist, cannot be loaded due to missing permissions, or does not support this operation. Please read the Graph API documentation at https://developers.facebook.com/docs/graph-api

[Alejandro 877]

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[Michael Pusch 15]

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