Adding a SpriteGlow component from code doesn't work on Android if there's no SpriteGlow in the scene

[CrystalPony]

If there's no SpriteGlow in the scene already adding a SpriteGlow component form the script causes a NullReferenceException because SpriteGlowMaterial.OUTLINE_SHADER is null.

[elringus]

Most likely the outline shader is not included to the build (it happens when none of the included assets reference SpriteGlow component directly). You can force-include the shader by assigning it to the "Always Included Shaders" in the Edit -> Project Settings -> Graphics.

[CrystalPony]

Yep, that's it, thanks!