What is the result of
cvx_version
If CVX 3.0beta, see CVX 3.0beta is riddled with bugs, which are very unlikely to ever be fixed. Use the latest build of CVX 2.2 .
If you are running CVX 2.2, note that SCA can be problematic, eventually resulting in wild inputs which are too extreme for the solver to handle, although I don’t think they should give rise to the rrror you got.