Openfire 3.9.3 getting There was an error one importing private key and signed certificate

[Zakir_saifi]

I am trying to upgrade certificates on OpenFire by importing them.
I did the following steps:-

1. Click on server setting and then server certificates
2. Then I imported the Private key and Certificates
3. ParaPhase for private key: ‘changeit’
4. After clicking on saving it is not showing any certificates.