Uncaught TypeError: Cannot set properties of undefined (setting 'bias')

[hazho]

When changing the light type from directional to ambient, sometimes the following error raised, we better safely set the properties of light:
Uncaught TypeError: Cannot set properties of undefined (setting 'bias')
The responsible module: \src\components\light.js

[mrxz]

This is indeed a bug in the light component. I've created a PR to fix it: #5748

In the meantime you can work around it by ensuring you disable the castShadow property whenever switching to a light type that does not support shadows (like ambient):

lightEl.setAttribute('light', { type: 'ambient', castShadow: false });