plot_pull using zfit fitted pdf

[JuanBSLeite]

Hi experts,

Is it possible to use zfit fitted pdf on plot_pull?

I'm trying to do this way but I'm getting the error: TypeError: object of type 'numpy.float64' has no len()

  hist_1 = hist.Hist(
        hist.axis.Regular(
            50, 5200, 5400, name="B0_MASS", label=r"$B^{0}$ Mass [MeV/c$^2$]", underflow=False, overflow=False
        )
    )

    hist_1.fill(tf_data)

    def fitted_func(x):
        return zfit.run(TotalModel.pdf_ext(x))
    
    main_ax_artists, sublot_ax_arists = hist_1.plot_pull(
        fitted_func,
        eb_ecolor="steelblue",
        eb_mfc="steelblue",
        eb_mec="steelblue",
        eb_fmt="o",
        eb_ms=6,
        eb_capsize=1,
        eb_capthick=2,
        eb_alpha=0.8,
        fp_c="hotpink",
        fp_ls="-",
        fp_lw=2,
        fp_alpha=0.8,
        bar_fc="royalblue",
        pp_num=3,
        pp_fc="royalblue",
        pp_alpha=0.618,
        pp_ec=None,
        ub_alpha=0.2,
    )

Thanks,
Juan