That output shows that CVX"s successive approximation method was used, which means there must be some exponential cone (including log) type functions in your code. Apparently, they must be in code which you omitted. That was indeed a crucial omission.
In light of that, use CVX 2.2 with mosek as solver. If that is not available to you, follow the directions 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