title: Unable to preview report - error occurred during report processing
body: <p>I am getting the following error when trying to preview an RDL report. </p>
  
  <p><img src="https://i.stack.imgur.com/4BTZn.png" alt="enter image description here"></p>
  
  <ol>
  <li>I have full rights to the SQL SERVER</li>
  <li>I have tested my connection to the datasource and it's fine</li>
  <li>I have full rights to the reporting services (serverName/reports)</li>
  <li>My datasource is set to windows authentication</li>
  <li>The event viewer both on the local and remote machines shows nothing</li>
  <li>SQL SERVER logs show nothing</li>
  </ol>
  
  <p>Please note: this report is embedded within an on-premises CRM instance, but I need to update the report. </p>
  
  <p><strong>What am I doing wrong? Any troubleshooting guidance would be most appreciated.</strong></p>