java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.sun.identity.saml.xmlsig.JKSKeyProvider.(JKSKeyProvider.java:136)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at com.sun.identity.saml2.key.KeyUtil.(KeyUtil.java:86)
at com.sun.identity.saml2.meta.SAML2MetaSecurityUtils.buildX509Certificate(SAML2MetaSecurityUtils.java:425)
at com.sun.identity.saml2.meta.SAML2Meta.buildDescriptorTemplate(SAML2Meta.java:968)
at com.sun.identity.saml2.meta.SAML2Meta.runTemplate(SAML2Meta.java:911)
at com.sun.identity.saml2.meta.SAML2Meta.runCommand(SAML2Meta.java:347)
at com.sun.identity.saml2.meta.SAML2Meta.main(SAML2Meta.java:313)

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