Objects stays solid when render in camera view

Question

When I activate render mode without view from camera it renders fine, but when I enter camera view and then try to render objects stays solid.

Answer 1

It looks like you have accidentally set a Render Border in your camera view, however, the border is so small that it appears that nothing is being rendered. I have highlighted the very, very tiny selection border in your picture below, but to turn it off use Ctrl + Alt + B. If you're interested in actually using it later, you can draw a new border with Ctrl + B