Some data sources permit the creation of custom attributes that you can use in the report design. If the report uses a custom attribute that is specific to a repository or project, the report runs as designed (extracting all of the data) only with a data source that has the custom attribute defined. Running on data sources that do not have the custom attributes results in undefined behavior (incomplete results, incorrect results etc).
To resolve the issue, you can modify your data selection to include data that uses that attribute, or you can remove the data attribute from your template. To change the text that displays from <data attribute not found>, you can customize it by changing the missing data text property value in your document specification. For more information on the missing data text property and other metadata properties, see Run time metadata properties reference.