Pyweka Error loading a Model, weka.filters.supervised.instance.RUS

I'm trying to load a weka model for pyweka but while I do:

clsfile = "/home/pablo/Escritorio/TFG/Bases de Datos, Modelos y Esquemas/modelo 2 CSE CS UBAG ADtree.model"
Model_1_2 = Classifier(jobject=serialization.read(clsfile))

And this model use the class weka.filters.supervised.instance.Rus but when I try to execute it I receive this error:

Exception in thread "Thread-0" java.lang.ClassNotFoundException: Unable to find class weka.filters.supervised.instance.RUS
    weka.core.SerializationHelper$1.resolveClass(SerializationHelper.java:363)
    java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1997)
    java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1864)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2195)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2490)
    java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2384)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2222)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2490)
    java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2384)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2222)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2490)
    java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2384)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2222)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2490)
    java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2384)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2222)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2490)
    java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2384)
    java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2222)
    java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1681)
    java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:493)
    java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:451)
    weka.core.SerializationHelper.read(SerializationHelper.java:278)
    weka.core.SerializationHelper.read(SerializationHelper.java:263)
---------------------------------------------------------------------------
JavaException                             Traceback (most recent call last)
/tmp/ipykernel_22791/3838490355.py in 
      1 clsfile = "/home/pablo/Escritorio/TFG/Bases de Datos, Modelos y Esquemas/modelo 2 CSE CS UBAG ADtree.model"
----> 2 Model_1_2 = Classifier(jobject=serialization.read(clsfile))
      3 
      4 print(Model_1_2)

~/.local/lib/python3.8/site-packages/weka/core/classes.py in serialization_read(filename)
     71     :rtype: JB_Object
     72     """
---> 73     return javabridge.static_call(
     74         "Lweka/core/SerializationHelper;", "read",
     75         "(Ljava/lang/String;)Ljava/lang/Object;",

~/.local/lib/python3.8/site-packages/javabridge/jutil.py in static_call(class_name, method_name, sig, *args)
    941     ret_sig = sig[sig.find(')')+1:]
    942     nice_args = get_nice_args(args, args_sig)
--> 943     result = fn(*nice_args)
    944     return get_nice_result(result, ret_sig)
    945 

~/.local/lib/python3.8/site-packages/javabridge/jutil.py in fn(*args)
    921         jexception = env.exception_occurred()
    922         if jexception is not None:
--> 923             raise JavaException(jexception)
    924         return result
    925     return fn

JavaException: Unable to find class weka.filters.supervised.instance.RUS

I tried to install that a package or do an import, but it didn't works, so I don't know what to do to solve it.