java.lang.NoClassDefFoundError: org/python/core/PyObject

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java.lang.NoClassDefFoundError: org/python/core/PyObject
at java.lang.ClassLoader.findBootstrapClass(Native Method)
at java.lang.ClassLoader.findBootstrapClass0(ClassLoader.java:946)
at java.lang.ClassLoader.loadClass(ClassLoader.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at org.python.core.SyspathJavaLoader.loadClass(SyspathJavaLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.python.core.Py.findClassEx(Py.java:817)
at org.python.core.packagecache.SysPackageManager.findClass(SysPackageManager.java:133)
at org.python.core.packagecache.PackageManager.findClass(PackageManager.java:28)

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