Unable To Connect To FTP With Dreamweaver CS6

Maybe your log-in password was reset by your host.  GoDaddy is infamous for doing this and not telling users.

Free FileZilla FTP client is updated regularly with latest security patches. In contrast, CS6 hasn't been updated in 13 years.  It's woefully outdated by today's web standards and way beyond it's "replace me" date.

MODERN CODE EDITORS:
-- Adobe Dreamweaver CC - https://www.adobe.com/products/dreamweaver.html
-- Codespaces (free, browser-based) - https://github.com/features/codespaces
-- Notepad++ (free) - https://notepad-plus-plus.org/
-- Nova (Mac only, formerly called Coda) - https://nova.app/
-- Pinegrow - https://pinegrow.com/
-- Sublime Text - http://www.sublimetext.com/
-- Visual Studio Code (free) - https://code.visualstudio.com/
-- Wappler ~ Visual Web App Builder - https://wappler.io/

Hope that helps.

Dreamweaver CS6 is a much older technology than a recent copy of Filezilla. If you go to Site --> Advanced --> FTP log before your next FTP attempt you will get a detailed FTP log with the error number and details from the server instead of the generic DW prompt that may be more helpful. But typically with this error it has to do with the login credentials/settings as there could possibly be a typo or other detail that is preventing the connection.