I have a lighting problem and i don't know where it comes from

I’m working on a school project and i just made a modular dock kit but i have a problem with the lighting in UE4 (All my objects are in dynamic lighting).

I found my answer ^^. I just activated Recompute Normals in the Build Settings.

Please mark this as the answer for other people to find.

The table like that I have seen in the university I have join. I will use to buy personal statement service to increase my writing logic’s. Use the light board in the working and test it out before the final outcome.