Jmeter throws Could not create keystore error for HTTPS
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I am using jmeter 2.7 and am trying to hit my test server that is HTTPS.
Per my last question "Ant"[http://stackoverflow.com/questions/11106796/setting-up-jmeter-to-do-https] did help me setting https correctly on my machine. It worked fine but then all of a sudden I can't do any https tests. 
I have not made any changes to my settings. I just have protocol set to https. When I run I get the below keystore error. Can some one please tell me how to fix this?
Could not create keystore: [default =KeyStore.getDefaultType()] not found
 
java.lang.RuntimeException: Could not create keystore: [default = KeyStore.getDefaultType()] not found at org.apache.jmeter.util.SSLManager.getKeyStore(SSLManager.java:116) at org.apache.jmeter.util.JsseSSLManager.createContext(JsseSSLManager.java:232) at org.apache.jmeter.util.JsseSSLManager.getContext(JsseSSLManager.java:198) 