Network failure when viewing a rendition in PDFTron

If you encounter a "Network failure" error when viewing a rendition in PDFTron in Meridian 2023, follow these instructions:

1. Check the browser debug console. To do this, you can press F12 when the PowerWeb or Explorer page appears.

2. In the debug console, open the Console tab.

3. Look for the following error message:

   "Access to …. has been blocked by CORS policy: The ‘Access-Control-Allow-Origin’ header contains multiple values …, but only one is allowed".

4. If this message appears:

   1. Edit the following file:

      C:\inetpub\wwwroot\BCSiteCache\web.config

   2. Remove the line below:

      <add name="Access-Control-Allow-Origin" ...>

   3. Save the file.
   4. Restart the BCSiteCache site.
   5. Check if the error persists.
5. If the message doesn't appear in the console, contact Support.