How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

Question

How can photon have energy, but no mass if “m=E/c^2” (E= mc^2)

In: 42

Answer 1

E= mc^2 asks how much energy is ‘locked’ within mass of an object. If this energy is released in pure form it will be released as photons. So this simplified version of the equation does not explain energy of photon itself in relation to its mass as photon is the solution here not the question.