Thanks a lot for looking into this. Unfortunately the HPO is still not working. Although the instance is starting now we are receiving the error below in the console of the application instance. When manually enqueueing the same experiment it does work, leading us to believe that this is not an environment issue. It also happens for cloned runs that worked in the past. Could this be related to the previous issue?

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 506, in ser_default_class
    value = dict(vars(obj))  # make sure we can serialize anything that resembles a dict
                 ^^^^^^^^^
TypeError: vars() argument must have __dict__ attribute
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/threading.py", line 1045, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.11/threading.py", line 982, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.11/site-packages/hpbandster/core/dispatcher.py", line 296, in job_runner
    worker.proxy.start_computation(self, job.id, **job.kwargs)
  File "/usr/local/lib/python3.11/site-packages/Pyro4/core.py", line 185, in __call__
    return self.__send(self.__name, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/Pyro4/core.py", line 437, in _pyroInvoke
    data, compressed = serializer.serializeCall(objectId, methodname, vargs, kwargs, compress=config.COMPRESSION)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/Pyro4/util.py", line 176, in serializeCall
    data = self.dumpsCall(obj, method, vargs, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/Pyro4/util.py", line 602, in dumpsCall
    return serpent.dumps((obj, method, vargs, kwargs), module_in_classname=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 69, in dumps
    return Serializer(indent, module_in_classname, bytes_repr).serialize(obj)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 229, in serialize
    self._serialize(obj, out, 0)
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 255, in _serialize
    return self.dispatch[t](self, obj, out, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 319, in ser_builtins_tuple
    serialize(elt, out, level + 1)
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 255, in _serialize
    return self.dispatch[t](self, obj, out, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 392, in ser_builtins_dict
    serialize(value, out, level + 1)
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 255, in _serialize
    return self.dispatch[t](self, obj, out, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 392, in ser_builtins_dict
    serialize(value, out, level + 1)
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 274, in _serialize
    func(self, obj, out, level)
  File "/usr/local/lib/python3.11/site-packages/serpent.py", line 516, in ser_default_class
    raise TypeError("don't know how to serialize class " +
TypeError: don't know how to serialize class <class 'numpy.int64'>. Give it vars() or an appropriate __getstate__