Cannot cast array data from dtype('O') to dtype('float64') according to the rule 'safe'

[SaeedArisha]

I keep getting this issue when I run the gsp_disaggregator.py.
A[pd.isnull(A)] = np.interp(x, xp, fp), This is where the error is pointed it is line 314 in gsp_support.py in interpolate function.
Please guide I'm unable to resolve the error