Hey Ron,
I just ran into the same problem. See here for a complete guide: https://www.igniterealtime.org/builds/openfire/docs/latest/documentation/ssl-gui de.html
Easy to miss, but decisive is: the KEY stored in your KEYSTORE needs to have the same password as the store itself.
So have a look at the keystore with “keytool -list -keystore KEYSTORE” and then set the password for your key using
"keytool -keystore KEYSTORE -keypasswd -alias “whateveraliasyouhave”. That should fix your problem - it did for me.
Frank