The solver is solving the dual problem, and reports it is infeasible, so CVX conclude that your original (primal) problem is unbounded. See https://yalmip.github.io/debuggingunbounded/ for tips on diagnosing that.
Given that your model involves log of CVX variable, I recommend that you either use Mosek 9.2 as solver, if that is available to you, oi if not, follow the advice in 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