How can I fix the almost-none lightning & shadows in this Eevee project?

The scene used to look good with the shadows and lightning stuff, but after I did some changes and looked at the rendered view again, the scene looks bad now… Any way to fix it?

It´s hard to say without more information. Can you show the setup, or send your file?

It was solved elsewhere, the problem was with the HDRI, so I was told to switch to cycles.