I appreciate your assistance with this, martin! Considering keywords on the linked page, I have no idea why my searches never brought this to light. Thank you for ending my headache.
Failed to connect to aaa.bbb.ccc.ddd: Network error: Connection timed out
Knocking FTP port.
FTP port opened, will suggest using FTP protocol.
Script: Network error: Connection to "example.com" timed out.
The server rejected SFTP connection, but it listens for FTP connections.
Did you want to use FTP protocol instead of SFTP? Prefer using encryption.