I need some help here. We've had SSRS on our production server up and running for several months, after moving from another server that ran for a few years with no issues. Suddenly, 10 days ago we are getting this error, and I haven't figured out why.
When rendering a report, we receive this message after a few seconds:
“For security reasons DTD is prohibited in this XML document. To enable DTD processing set the ProhibitDtd property on XmlReaderSettings to false and pass the settings into XmlReader.Create method.”