Unity WebGL fails to build with FMOD implemented

As mentioned by Mathew in the thread linked below:

FMOD doesn’t natively support Ambisonics, support is derived by using the Resonance or Oculus spatialization plugins. Unfortunately these plugins aren’t available for WebGL, they would need to be ported over.

Unfortunately without the Resonance plugins it isn’t possible to play Ambisonics with FMOD.