Power View error: Cannot create a connection to data source 'EntityDataSource'

I have Power View on SharePoint 2013. I have both Multidimentional and Tabular model in use.
I have several Report.drlx file in Report libary in SharePoint.
My colleague is getting following error when building report by dragging Facts and Dimentions to report.
On the hand, I'm not receiving error.
Error is cannot create a connection to data source 'EntityDataSource'
<detail><ErrorCode xmlns="rsErrorOpeningConnection</ErrorCode><HttpStatus">http://www.microsoft.com/sql/reportingservices">rsErrorOpeningConnection</ErrorCode><HttpStatus
xmlns="400</HttpStatus><Message">http://www.microsoft.com/sql/reportingservices">400</HttpStatus><Message xmlns="Cannot">http://www.microsoft.com/sql/reportingservices">Cannot
create a connection to data source 'EntityDataSource'.</Message><HelpLink xmlns="http://go.microsoft.com/fwlink/?LinkId=20476&EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&EvtID=rsErrorOpeningConnection&ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&ProdVer=12.0.2000.8</HelpLink><ProductName">http://www.microsoft.com/sql/reportingservices">http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsErrorOpeningConnection&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=12.0.2000.8</HelpLink><ProductName
xmlns="Microsoft">http://www.microsoft.com/sql/reportingservices">Microsoft SQL Server Reporting Services</ProductName><ProductVersion xmlns="12.0.2000.8</ProductVersion><ProductLocaleId">http://www.microsoft.com/sql/reportingservices">12.0.2000.8</ProductVersion><ProductLocaleId
xmlns="1033</ProductLocaleId><OperatingSystem">http://www.microsoft.com/sql/reportingservices">1033</ProductLocaleId><OperatingSystem xmlns="OsIndependent</OperatingSystem><CountryLocaleId">http://www.microsoft.com/sql/reportingservices">OsIndependent</OperatingSystem><CountryLocaleId
xmlns="1033</CountryLocaleId><MoreInformation">http://www.microsoft.com/sql/reportingservices">1033</CountryLocaleId><MoreInformation xmlns="<Source>Microsoft.ReportingServices.ProcessingCore</Source><Message">http://www.microsoft.com/sql/reportingservices"><Source>Microsoft.ReportingServices.ProcessingCore</Source><Message
msrs:ErrorCode="rsErrorOpeningConnection" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsErrorOpeningConnection&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=12.0.2000.8"
xmlns:msrs="Cannot">http://www.microsoft.com/sql/reportingservices">Cannot create a connection to data source 'EntityDataSource'.</Message><MoreInformation><Source>Microsoft.AnalysisServices.AdomdClient</Source><Message></Message><MoreInformation><Source>Microsoft.SharePoint</Source><Message>Could
not retrieve a valid Windows identity.</Message><MoreInformation><Source>mscorlib</Source><Message>WTS0003: The caller is not authorized to access the service.</Message></MoreInformation></MoreInformation></MoreInformation></MoreInformation><Warnings
xmlns="http://www.microsoft.com/sql/reportingservices" /></detail>
Kenny_I

Hi Kenny_I,
As per my understanding, I think this issue may be caused by your colleague has no permission to access to data source 'EntityDataSource', it is a Kerberos issue. When report server uses ‘Windows authentication (integrated) or SharePoint user’ as the credentials
to access the data source 'EntityDataSource', the authentication would be failed.  So we should try to check if the issue is in this scenario. If in this case, we should change the credentials to stored credentials.
Besides, if we don’t configure C2WTS Service Account to use Local System, it needs the following local policy rights:
Act as part of the operating system.
Impersonate a client after authentication.
Log on as a service.
For more details, please refer to the following blog:
http://www.codeovereasy.com/2014/01/powerview-report-fails-no-credentials-are-available-in-the-security-package/
Hope this helps.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

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    Karthik
    <[email protected]>

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