This link 
[https://qiskit.org/documentation/machine-learning/stubs/qiskit_machine_learning.kernels.QuantumKernel.construct_circuit.html#qiskit_machine_learning.kernels.QuantumKernel.construct_circuit][1]
tells us that the circuit can be built automatically, but an error was found after using it, how can I solve it?


    from qiskit import BasicAer
    from qiskit.circuit.library import ZZFeatureMap
    from qiskit.utils import QuantumInstance, algorithm_globals
    from qiskit_machine_learning.algorithms import QSVC
    from qiskit_machine_learning.kernels import QuantumKernel
    seed = 12345
    X_data = np.array([[1,2,7,12],[3,7,7,11],[12,18,7,90]])
    Y_data = np.array([[1,12,7,22],[3,71,7,111],[12,118,7,90]])
    y_train = np.array([12,5,9])
    print(X_data.shape[0],X_data.shape[1])
    qbits = X_data.shape[0]
    ansatz0 = ZZFeatureMap(feature_dimension=qbits, insert_barriers = True, name = 'Quantum Kernel',reps=1, parameter_prefix='x')
    ansatz1 = ZZFeatureMap(feature_dimension=qbits, insert_barriers = True, name = 'Quantum Kernel',reps=1, parameter_prefix='y').inverse()
    qc = ansatz0.compose(ansatz1)
    qc.draw('mpl')
    QI = QuantumInstance(BasicAer.get_backend("qasm_simulator"), shots=1024, seed_simulator=seed, seed_transpiler=seed)
    qk = QuantumKernel(feature_map=ansatz0, quantum_instance=QI)
    qc = qk.construct_circuit(x=X_data, y=Y_data, is_statevector_sim = False)
    qc.draw('mpl')


OUT:

    3 4
    ---------------------------------------------------------------------------
    CircuitError                              Traceback (most recent call last)
    Input In [323], in <cell line: 18>()
         16 QI = QuantumInstance(BasicAer.get_backend("qasm_simulator"), shots=1024, seed_simulator=seed, seed_transpiler=seed)
         17 qk = QuantumKernel(feature_map=ansatz0, quantum_instance=QI)
    ---> 18 qc = qk.construct_circuit(x=X_data, y=Y_data, is_statevector_sim = False)
         19 qc.draw('mpl')
    
    File d:\miniconda3\lib\site-packages\qiskit_machine_learning\kernels\quantum_kernel.py:317, in QuantumKernel.construct_circuit(self, x, y, measurement, is_statevector_sim)
        314 qc = QuantumCircuit(q, c)
        316 x_dict = dict(zip(self._feature_map.parameters, x))
    --> 317 psi_x = self._feature_map.assign_parameters(x_dict)
        318 qc.append(psi_x.to_instruction(), qc.qubits)
        320 if not is_statevector_sim:
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\library\n_local\n_local.py:810, in NLocal.assign_parameters(self, parameters, inplace)
        807 if not self._is_built:
        808     self._build()
    --> 810 return super().assign_parameters(parameters, inplace=inplace)
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\quantumcircuit.py:2663, in QuantumCircuit.assign_parameters(self, parameters, inplace)
       2661     # replace the parameters with a new Parameter ("substitute") or numeric value ("bind")
       2662     for parameter, value in unrolled_param_dict.items():
    -> 2663         bound_circuit._assign_parameter(parameter, value)
       2664 else:
       2665     if len(parameters) != self.num_parameters:
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\quantumcircuit.py:2749, in QuantumCircuit._assign_parameter(self, parameter, value)
       2747 # Normal ParameterExpression.
       2748 if isinstance(assignee, ParameterExpression):
    -> 2749     new_param = assignee.assign(parameter, value)
       2750     # if fully bound, validate
       2751     if len(new_param.parameters) == 0:
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\parameterexpression.py:91, in ParameterExpression.assign(self, parameter, value)
         89 if isinstance(value, ParameterExpression):
         90     return self.subs({parameter: value})
    ---> 91 return self.bind({parameter: value})
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\parameterexpression.py:113, in ParameterExpression.bind(self, parameter_values)
         94 """Binds the provided set of parameters to their corresponding values.
         95 
         96 Args:
       (...)
        109     parameter_values.
        110 """
        112 self._raise_if_passed_unknown_parameters(parameter_values.keys())
    --> 113 self._raise_if_passed_nan(parameter_values)
        115 symbol_values = {}
        116 for parameter, value in parameter_values.items():
    
    File d:\miniconda3\lib\site-packages\qiskit\circuit\parameterexpression.py:207, in ParameterExpression._raise_if_passed_nan(self, parameter_values)
        203 nan_parameter_values = {
        204     p: v for p, v in parameter_values.items() if not isinstance(v, numbers.Number)
        205 }
        206 if nan_parameter_values:
    --> 207     raise CircuitError(
        208         f"Expression cannot bind non-numeric values ({nan_parameter_values})"
        209     )
    
    CircuitError: 'Expression cannot bind non-numeric values ({ParameterVectorElement(x[0]): array([ 1,  2,  7, 12])})'


  [1]: https://qiskit.org/documentation/machine-learning/stubs/qiskit_machine_learning.kernels.QuantumKernel.construct_circuit.html#qiskit_machine_learning.kernels.QuantumKernel.construct_circuit