I'm sorry this has been discussed in excess and many intelligent people have tried to solve it. There are also parallel threads that others experimented with this camera, but nothing came out in the end/yet.

At the moment this is considered a limitation of the front camera.
If you are in daylight and with plenty of light, you can get a greenish picture. In all other cases it is unusable.

If you want to test, take a picture of a light bulb.