java.lang.SecurityException: no manifiest section for signature file entry iaik/utils/IaikSecurity.class

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java.lang.SecurityException: no manifiest section for signature file entry iaik/utils/IaikSecurity.class
at sun.security.util.SignatureFileVerifier.verifySection(SignatureFileVerifier.java:260)
at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:172)
at java.util.jar.JarVerifier.processEntry(JarVerifier.java:239)
at java.util.jar.JarVerifier.update(JarVerifier.java:194)
at java.util.jar.JarFile.initializeVerifier(JarFile.java:300)
at java.util.jar.JarFile.getInputStream(JarFile.java:362)
at sun.misc.URLClassPath$5.getInputStream(URLClassPath.java:616)
at sun.misc.Resource.getBytes(Resource.java:57)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
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)

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