"ssl_error_no_cypher_overlap" error shows after clicking SSL Manager link

ilovepumpkin

I installed OS version 20130429 on my RHEL - Red Hat Enterprise Linux Server release 5.5 (Tikanga). And start Dashboard then click Firefox icon, the initial page is shown. Then I click SSL Manager link, I see the following error. I have also searched the forum and I didn't find the solution. Please help.

My Firefox is ESR 24.4
My Java is Oracle Java 1.6.0_27

I am sure the keytool is in $PATH - I can see the keytool instruction when I type 'keytool' in console. So this might not be the cause.

Error in Firefox
==============================
Secure Connection Failed

An error occurred during a connection to sahi.example.com. Cannot communicate securely with peer: no common encryption algorithm(s). (Error code: ssl_error_no_cypher_overlap)

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem. Alternatively, use the command found in the help menu to report this broken site.


I also tried to start Dashboard using dashboard.sh and saw the following error.
=======================================================================
Sahi properties file = /root/sahi/config/sahi.properties
Sahi user properties file = /root/sahi/userdata/config/userdata.properties
>>>> Sahi started. Listening on port: 9999
>>>> Configure your browser to use this server and port as its proxy
>>>> Browse any page and CTRL-ALT-DblClick on the page to bring up the Sahi Controller

---

Reading browser types from: /root/sahi/userdata/config/browser_types.xml
Chrome was not found at /usr/bin/google-chrome

---

Apr 4, 2014 10:22:18 AM net.sf.sahi.test.ProcessHelper execute
INFO: /usr/bin/firefox -profile "/root/sahi/userdata/browser/ff/profiles/sahi0" -no-remote http://sahi.example.com/_s_/dyn/Driver_initialized?browserType=firefox
Apr 4, 2014 10:22:18 AM net.sf.sahi.ssl.SSLHelper getKeyManagerFactoryForRemoteFetch
INFO: No SSL Client Cert specified
java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:375)
at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:628)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:38)
at java.security.KeyStore.load(KeyStore.java:1185)
at net.sf.sahi.ssl.SSLHelper.getKeyManagerFactory(SSLHelper.java:106)
at net.sf.sahi.ssl.SSLHelper.createSocketFactory(SSLHelper.java:70)
at net.sf.sahi.ssl.SSLHelper.getSSLClientSocketFactory(SSLHelper.java:59)
at net.sf.sahi.ssl.SSLHelper.convertToSecureSocket(SSLHelper.java:190)
at net.sf.sahi.ssl.SSLHelper.convertToSecureServerSocket(SSLHelper.java:199)
at net.sf.sahi.ProxyProcessor.processConnect(ProxyProcessor.java:180)
at net.sf.sahi.ProxyProcessor.processAsProxy(ProxyProcessor.java:142)
at net.sf.sahi.ProxyProcessor.run(ProxyProcessor.java:93)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Apr 4, 2014 10:22:23 AM net.sf.sahi.test.ProcessHelper$PIDGatherer run
INFO: PIDs: [19568]; 5145 ms