Please try it with 4.3.5. If nothing else, it would show list of authentication methods your server supports in the error message.

How do I resolve this error?
Disconnected: No supported authentication methods available

Here's the script I'm running: https://pastebin.com/pbGsdmhw

And here's the log: https://pastebin.com/9kBrhykc

I have no idea what the error means or how to fix it.