Linux filezilla Error: Pageant failed to answer challenge

Question

So for a long time I have had no issues with keys and filezilla.

This morning I woke up, attempted to sftp into my Raspberry Pi and I get this:

Problem

Status: Connecting to pi:2222...
Response:   fzSftp started, protocol_version=6
Command:    keyfile "/home/cx/.ssh/id_rsa_putty"
Command:    open "cybex@pi" 2222
Error:  Pageant failed to answer challenge
Error:  Could not connect to server

I am using the putty key from my Windows Putty.

Tried: I have recreated new keys - openssh (for the sake of it), downloaded and installed puttygen for linux and regenerated keys (as this is what I used before), rebooted my Pi

None of this works, I cannot find anyone who has had the same issue,

Anyone know why this happens, I am at a complete loss!

Answer 1

So this is awkward...

A simple system restart solved my issue,

for the record,

Filezilla: which keys to use

linux puttygen keys work (RSA Key tested)

OpenSSH linux keys work (that is the built in ssh uitility RSA and ECDSA keys tested)

Hope this helps!