spotlight problem

I have created a spotlight in my Unity Editor (the version is 2018.3.14) and it does not work. No matter what methods I tried, there is no beam of light coming out of the “origin”. However, when I clicked on the “draw halo” button, there is a halo coming out.
In addition, my direciontal light seems to be working fine.
As for the settings. I have made the quality “very high” and pixel light count parameter is 3. For the spotlight itself, the render mode is Important, and culling mask is everything. (I have tried other combinations, but they dont seem to work)
Thanks a lot for your answers!

Have you adjusted the “Range” of the spotlight to be long enough?

This is usually a depth issue. Adjust the Z of the light so that it is further forward than the camera.