Thanks for your feedback.
If you still experience the problem in version 3.2.4 please contact us directly through the ‘Contact Support’ button here – http://support.termius.com/
Would be great if you can provide us with the auth logs as well.
Thanks.Ivan Mcdohl commented
it's all good now!
at first i thought it(private key field) was the key path,
i just copied my-key.pem content to the private key field then it works, its stupid of me
thankyou so much