You haven’t told us what you mean by “he failed”.
Did CVX accept the problem? I think it should have.
Did the solver fail to solve the problem? That is possible. To minimize the chances of that happening, make sure the problem scaling is good, use CVX 2.2 with Mosek 9.x if possible, 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 .
In the future, please copy and paste code using the Preformatted text icon, rather than posting an image of code.