Filezilla needed to be updated. I updated it and then I got the same error except this time the error message was more descriptive.
Response: 530 Login authentication failed
Status: Check your login credentials. The entered password starts or ends with a space character.
Error: Critical error: Could not connect to server
Aha... the entered password had a space at the end... gosh darn it!
That fixed the problem. Hope this helps others.
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