See my comments in your previous thread Disciplined convex programming error: Invalid numeric values (NaNs) may not be used in CVX expressions. . They didn’t magically become invalid because you started a new thread on the same topic.
One other thing you can try is to use Mosek as solver, if available to you. Otherwise, follow the advice at CVXQUAD: How to use CVXQUAD's Pade Approximant instead of CVX's unreliable Successive Approximation for GP mode, log, exp, entr, rel_entr, kl_div, log_det, det_rootn, exponential cone. CVXQUAD's Quantum (Matrix) Entropy & Matrix Log related functions .
But perhaps your SCA implementation is just is not up to the task, as I suggested previously.