I get Report Server error when deploying SSRS report from visual studio 2010 to Sharepoint

I get the following error when trying to deploy any report from Visual Studio 2010. It worked two days ago and nothing changed in my environment but getting the below error. I'm new to SSRS and Sharepoint, what could be the problem and how to fix this issue. I'm using SQL Server 2008

Error      64      Report Server has encountered a SharePoint error. ---> Microsoft.ReportingServices.Diagnostics.Utilities.SharePointException: Report Server has encountered a SharePoint error. ---> Microsoft.SharePoint.SPException: The URL 'Exposures.rdl' is invalid.  It may refer to a nonexistent file or folder, or refer to a valid file or folder that is not in the current Web. ---> System.Runtime.InteropServices.COMException: The URL 'Exposures.rdl' is invalid.  It may refer to a nonexistent file or folder, or refer to a valid file or folder that is not in the current Web.            0      0
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Anthony AdinolfiChief Information OfficerCommented:
Are you running SSRS in SharePoint integrated mode? What do you see in the ULS at the time you receive the error? Can you copy the ULS entry in its entirety so that we can review it? Additionally... this post may be of some help: http://sharepointpromag.com/sharepoint/sql-server-2008-r2-reporting-data-source-error

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