Error decoding client certificate

I try to Login to FTPS server from WinSCP (v 5.17) using client certificate (.p12 format).
While I entered the passphrase for the client certificate, is shows

Error decoding certificate

I am sure that I don't enter wrong passphrase.

Then when I try with older WinSCP version (v.5.13.1), I can login to the FTPS server successfully with same client certificate and passphrase.

*I don't change any WinSCP setting in both v.5.17 or v.5.13.1

I'm getting the same error with my Certificate.
I will have to revert back to an older version.

Thanks for your reports.

This bug has been added to the tracker:
Issue 1830 – Cannot use TLS/SSL client certificate

Can you send me an email, so I can send you back a development version of WinSCP for testing? Please include a link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.