"Could not connect to the server"

Each time I click on a web link in a DTPO document, the attempt fails and I get the message “Could not connect to the server”.

If I right-click on the link and choose “Open Link” at the top of the contextual menu, the link always opens as expected in Safari.

How do I get these links to open in the DTPO browser?

Thanks for helping. --RD

Do you use LittleSnitch or any other tool to block HTTP requests?