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java.lang.UnsupportedClassVersionError: org/bouncycastle/jce/provider/BouncyCastleProvider (Unsupported major.minor version 50.0)	at java.lang.ClassLoader.defineClass0(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:537)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)	at java.net.URLClassLoader.access$100(URLClassLoader.java:55)	at java.net.URLClassLoader$1.run(URLClassLoader.java:194)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:187)	at java.lang.ClassLoader.loadClass(ClassLoader.java:289)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)	at java.lang.ClassLoader.loadClass(ClassLoader.java:235)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)	at org.openas2.util.AS2UtilOld.getCryptoHelper(AS2UtilOld.java:30)	at org.openas2.cert.PKCS12CertificateFactory.init(PKCS12CertificateFactory.java:253)	at org.openas2.util.XMLUtil.getComponent(XMLUtil.java:38)	at org.openas2.XMLSession.loadCertificates(XMLSession.java:98)	at org.openas2.XMLSession.load(XMLSession.java:78)	at org.openas2.XMLSession.(XMLSession.java:46)	at org.openas2.app.OpenAS2Server.start(OpenAS2Server.java:32)	at org.openas2.app.OpenAS2Server.main(OpenAS2Server.java:17)