Comment on “Energy Spectrum of a Dirac Particle with Position-Dependent Mass Under the Influence of the Aharonov-Casher Effect”

It is shown that the paper “Energy spectrum of a Dirac particle with position-dependent mass under the influence of the Aharonov-Casher effect,” by Oliveira et al. (Braz. J. Phys. 49, 801 2019), is based on a series of ingredients clearly incorrect.