000034833 - Images in RSA Archer Notifications are missing or broken: The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF

• Images do not appear in the notification.  
• Error message from logs: The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF.
• From IIS Manager, confirmed the company_files, API, and WS are set to Anonymous Authentication.  The Archer Service account has full access to company_files location. 

<ApplicationData>
  <TraceData>
    <DataItem>
      <TraceRecord Severity="Error" xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord">
        <TraceIdentifier>ArcherTech.Notifications</TraceIdentifier>
        <Description>Error loading the bytes for an embedded image in the email generated for notification template 'Sample notification' with id = '240'.</Description>
        <AppDomain>ArcherTech.JobFramework.Job.exe</AppDomain>
        <Exception>
          <ExceptionType>ArcherTech.Common.Exceptions.ImageLoadingNotificationException, ArcherTech.Common, Version=5.5.40200.1016, Culture=neutral, PublicKeyToken=null</ExceptionType>
          <Message>Error loading the bytes for an embedded image in the email generated for notification template 'Sample notification' with id = '240'.</Message>
          <Source />
          <ContextData>
            <Resolution>Please verify that you have access to the location where the image is stored. For further support, please contact your system administrator.</Resolution>
            <ImageName>Samplefile.PNG</ImageName>
            <ImagePath>https://servername/company_files/50000/icons/Samplefile.PNG</ImagePath>
          </ContextData>
          <StackTrace />
          <InnerException>
            <ExceptionType>System.Net.WebException, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
            <Message>The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF</Message>
            <Source>System</Source>
            <StackTrace>
                  at System.Net.HttpWebRequest.GetResponse()
                  at ArcherTech.Notifications.ExtensionMethods.EmailMessageExtensionMethods.GetImage(SessionContext sessionContext, KeyValuePair`2 imageName, Notification notification)
            </StackTrace>
          </InnerException>
        </Exception>
      </TraceRecord>
    </DataItem>
  </TraceData>
</ApplicationData>

1. Open IIS Manager and select the Archer web site
2. In middle pane, open HTTP Response Headers
3. Verify all the Response Headers are set up correctly. If any contain a space or new line, fix it.
4. Or remove any unwanted Response Headers to fix the issue