SSH Client Plugin I/O Authentication Error on Android 14

[xenotronicgamestudio-prog]

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Describe the bug / provide steps to reproduce it

I have been trying for days to get the official Acode SSH Client plugin to connect to a remote server via SFTP using a key. Everything works perfectly in Termux, but the plugin consistently fails with “I/O error: Authentication failed” even when the exact same key and settings succeed in Termux.
Environment
Acode version: 1.11.1 (paid / ad-free)
Android version: 14 (stock Samsung One UI 6.1)
Device: Galaxy S23 series
SSH Client plugin version: latest from the in-app store (installed via https://acode.app/plugin/acode.ssh.client)
Key details
Key type: RSA 2048-bit and 4096-bit (both tested)
Passphrase: tried with and without
Key location: /storage/emulated/0/the.key (passphrase-free) and /storage/emulated/0/the2nd.key (with passphrase)
Storage permission: “Allow access to all files” granted
Same private key + public key on server works instantly with ssh -i ~/.ssh/the.key opc@... in Termux (no errors, instant login)
Steps to reproduce
Add new SFTP connection
Host: any reachable SSH server (tested on Oracle Cloud Linux, Ubuntu, etc.)
Port: 22
Username: valid user
Private key: select any RSA key from /storage/emulated/0/
Passphrase: blank or correct passphrase
Mode: SFTP
Save → tap the connection → “I/O error: Authentication failed”
Expected behavior
Connection succeeds and remote filesystem mounts (like it does in Termux, JuiceSSH, ConnectBot, etc.).
Actual behavior
Immediate “I/O error: Authentication failed” even though the key is proven valid.
This bug has been reported by multiple users for over a year (I/O errors with no-passphrase keys, passphrase-protected keys, ED25519, etc.). The underlying JSch library seems to be mishandling key decryption or Android’s scoped-storage paths. The workaround most people end up using is AcodeX/Termux, but the official SSH Client plugin is still seemingly broken on modern Android.

Thank you.

Environment

App version: 1.11.7 (paid)
Android version: 14
Android SDK: 34
Device: Galaxy S23 / SM-S918B
Brand: samsung
Manufacturer: samsung
WebView version: 129.0.6668.99 (Android System WebView)
WebView package: com.google.android.webview
Architecture: arm64-v8a
Rooted: false
Termux installed: true

If applicable, add mockups / screenshots regarding your vision

No response

If applicable, attach your Acode.log file to this issue.

Acode.log

[UnschooledGamer]

@xenotronicgamestudio-prog Hey there, I would Like to tell you that, The plugin you mentioned (SSH Client plugin) as the Official Plugin is a Third Party Plugin, And For that plugin you need to contact the Developer of that Plugin.

Secondly, Acode has support by default ( / built-in ) for SFTP, FTP.

This bug has been reported by multiple users for over a year (I/O errors with no-passphrase keys, passphrase-protected keys, ED25519, etc.). The underlying JSch library seems to be mishandling key decryption or Android’s scoped-storage paths. The workaround most people end up using is AcodeX/Termux, but the official SSH Client plugin is still seemingly broken on modern Android.

I don't really know What "I/O errors with no-passphrase keys, passphrase-protected keys" is referring to!
The "ED25519 Keys" issues were fixed by me in d98d349

[xenotronicgamestudio-prog]

Thank you for the timely response.

I suppose my issue is with the 3rd party plugin. With this plugin that is the error I can not shake when attempting to use the sftp file browser: 'I/O Error: Authentication Failed'. I have tried each key type passworded and without password aswell. I am however able to ssh with the Acode terminal, which shows the VM is setup correct.

'I/O Error: Authentication Failed' ...is this not an error Acode throws? Might it be specific to the plugin?

[UnschooledGamer]

@xenotronicgamestudio-prog I suspect it's not an issue with Acode if you are using a third-party plugin. for this! if you can reproduce The issue on Acode's Implementation, Kindly do so (and a Video would be better, you can use any dummy servers.)