More information that we found as here is the stack trace...

'CLSID' is an unexpected token. The expected token is '"' or '''. Line 21, position 44.
  Message: Exception encountered, stack trace:
  Laserfiche.Integration.Wopi.WopiDiscovery.DiscoverCallback
  System.Threading.ExecutionContext.RunInternal
  System.Threading.ExecutionContext.Run
  System.Threading.TimerQueueTimer.CallCallback
  System.Threading.TimerQueueTimer.Fire
  System.Threading.TimerQueue.FireNextTimers
Exception details:
  Message: 'CLSID' is an unexpected token. The expected token is '"' or '''. Line 21, position 44.
  Stack trace:    at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.ParseAttributes()
   at System.Xml.XmlTextReaderImpl.ParseElement()
   at System.Xml.XmlTextReaderImpl.ParseElementContent()
   at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
   at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
   at System.Xml.XmlDocument.Load(XmlReader reader)
   at System.Xml.XmlDocument.LoadXml(String xml)
   at Laserfiche.Integration.Wopi.WopiDiscovery.Discover(String url)
   at Laserfiche.Integration.Wopi.WopiDiscovery.DiscoverCallback(Object state)