Old site created with DMX connection file not found

I downloaded an older website done in DMX extensions on Dreamweaver. I can open queries, etc from the server connect. When I click on the connections step, I get the following error. I have confirmed that the connection file in question exists and it does connect to the mysql db. But this step does not work. Any suggestions on editing a file to see it?

Screenshot 2020-04-16 at 15.28.15595×660 13.5 KB