Error:object arrays are not supported in optimization using constraints about riskfolio-lib HOT 12 CLOSED

display(Y)
print(Y.dtypes)
print(Y.index.dtype)

method_mu='hist' # Method to estimate expected returns based on historical data.
method_cov='hist' # Method to estimate covariance matrix based on historical data.

port.assets_stats(
    method_mu=method_mu, 
    method_cov=method_cov, 
    d=0.94
)

model='Classic'
rm = 'MV'
obj = 'Sharpe'
hist = True
rf = 0
l = 0

w = port.optimization(
    model=model, 
    rm=rm, 
    obj=obj, 
    rf=rf, 
    l=l, 
    hist=hist
)

display(w.T)

print(Y.cov())

from scipy.linalg import sqrtm
G = sqrtm(Y.cov().to_numpy())
print(G)

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[7], line 11
      8 obj = 'Sharpe'
      9 rf = 0
---> 11 w = port.optimization(
     12     model=model,
     13     rm=rm,
     14     obj=obj,
     15     rf=rf
     16 )
     18 display(w.T)

File ~/Riskfolio-test/venv/lib/python3.11/site-packages/riskfolio/src/Portfolio.py:1316, in Portfolio.optimization(self, model, rm, obj, kelly, rf, l, hist)
   1313 # MV Model Variables
   1315 g = cp.Variable(nonneg=True)
-> 1316 G = sqrtm(sigma)
   1317 risk1 = g**2
   1318 devconstraints = [cp.SOC(g, G.T @ w)]

File ~/Riskfolio-test/venv/lib/python3.11/site-packages/scipy/linalg/_matfuncs_sqrtm.py:167, in sqrtm(A, disp, blocksize)
    118 """
    119 Matrix square root.
    120 
   (...)
    164 
    165 """
    166 byte_size = np.asarray(A).dtype.itemsize
--> 167 A = _asarray_validated(A, check_finite=True, as_inexact=True)
    168 if len(A.shape) != 2:
    169     raise ValueError("Non-matrix input to matrix function.")

File ~/Riskfolio-test/venv/lib/python3.11/site-packages/scipy/_lib/_util.py:255, in _asarray_validated(a, check_finite, sparse_ok, objects_ok, mask_ok, as_inexact)
    253 if not objects_ok:
    254     if a.dtype is np.dtype('O'):
--> 255         raise ValueError('object arrays are not supported')
    256 if as_inexact:
    257     if not np.issubdtype(a.dtype, np.inexact):

ValueError: object arrays are not supported