Источник:
http://alexvoy.blogspot.com/2016/12/...essreport.html
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If after all sorts of checking your security settings you still have the subject error, please just re-import the problematic SSRS report.
As explained by Nicolas GRANJON, under the hood, I quote, re-importing the report (re)generate data in the ModelSecurityPermission table of the model database, especially the permissions links between the report and the tables that it uses, and the data provider class.
Источник:
http://alexvoy.blogspot.com/2016/12/...essreport.html