go to: Server Manager -> System Properties Search for "xmpp.socket.ssl.client.keypass" Make sure its right and it should fix your problem if you are using the default files make sure its value is 「changeit」 xmpp.socket.ssl.active true xmpp.socket.ssl.client.keypass xmpp.socket.ssl.client.keystore /opt/openfire/resources/security/keystore xmpp.socket.ssl.client.trustpass xmpp.socket.ssl.client.truststore /opt/openfire/resources/security/truststore xmpp.socket.ssl.keypass xmpp.socket.ssl.keystore resources/security/keystore xmpp.socket.ssl.trustpass xmpp.socket.ssl.truststore resources/security/truststore 有關路徑:留空的話,系統會選擇默認路徑。能夠填寫相對路徑(相對於安裝目錄),也能夠選擇絕對路徑
https://discourse.igniterealtime.org/t/keystore-problem-cannot-convert-combined-of-type-class-java-lang-string-to-class-org-jivesoftware-openfire-spi-connectiontype/80111/1java