When you say “connect,” that implies you are using either the server or cloud edition. Which one? Or, if you are actually using the desktop edition, you must be referring to launching the program, not connecting. Please clarify.
Also, post a screen shot of the actual error message.
As I said, you need to clarify your situation. When and where does the problem occur? Are you trying to launch the application on your server or log into the server application with a web browser? And please post a screen shot of the actual message.