Unable to cast object of type 'microsoft.crm.reporting.datae
                            
                         
                        
                     
                 
                
                    Hi All,
I am trying to create a report in CRM Online where I am getting the following error
Unable  to cast object of type  'Microsoft.Crm.Reporting.DataExtension.Client.Fetch.FetchProxy' to type  'Microsoft.Crm.Sandbox.SandboxFetchProxy'.
For this I have created the following FetchXML 
<fetch version="1.0" output-format="xml-platform" mapping="logical" distinct="false">
  <entity name="opportunity" enableprefiltering="1" >
    <attribute name="name" />
    <attribute name="opportunityid" />
    <attribute name="customerid" />
    <attribute name="estimatedvalue" />
   <attribute name="estimatedclosedate" />
    <attribute name="statuscode" />
    <attribute name="new_mostrecentreview" />
    <order attribute="name" descending="false" />
	
	<filter type="and">
      <condition attribute="statecode" operator="in">
        <value>0
        <value>1
      
    
    <link-entity name="new_review" from="new_reviewid" to="new_mostrecentreview"  link-type="outer" alias="MRR">
      <attribute name="new_reviewid" />
      <attribute name="new_score" />
      
<attribute name="new_reviewdate" />
 
  
Please help me to solve this issue.