FTP/SFTP authentication failure with valid credentials

[calebfaruki]

Using valid credentials, I've tried accessing a remote FTP server. But it doesn't work. This is the output I get

[ftp-sync] no existing ftp settings 2main.js:263 
[ftp-sync] started ftp upload NodeDebugUtils.js:117
[node-log 11:59:30 PM] using password authentication NodeDebugUtils.js:117
[node-log 11:59:30 PM] ssh connection error: Authentication failure. Available authentication methods: publickey,keyboard-interactive NodeDebugUtils.js:117
[node-log 11:59:30 PM] connection close

Here are my system specs:

• Windows 8.1 Pro
• Adobe Brackets Release 1.3 build 1.3.0-16022
• FTP-Sync Plus 2.0.4

The connection is supposed to be SFTP, but I tried it with FTP anyways. Attempted the connection with and without my firewall enabled. Same results. This latest output was with FTP, then SFTP, with Node.js and Brackets added to the list of accepted programs in my Firewall settings.

Any advice on how to troubleshoot this issue?