I’m trying to run a JAR file through the command prompt with the java -jar <jarfile> command. When I ran the command, I got this error. I tried searching online for what the error meant and how to fix it, but came up with nothing. For context, I’m trying to run the UnApkm.jar program.

java.io.IOException: incorrect algo
        at com.souramoo.unapkm.UnApkm.processHeader(UnApkm.java:75)
        at com.souramoo.unapkm.UnApkm.processHeader(UnApkm.java:67)
        at com.souramoo.unapkm.UnApkm.processHeader(UnApkm.java:63)
        at com.souramoo.unapkm.UnApkm.decryptStream(UnApkm.java:103)
        at com.souramoo.unapkm.UnApkm.decryptFile(UnApkm.java:163)
        at com.souramoo.unapkm.UnApkm.main(UnApkm.java:201)