Meterial reflectio doesn't work.

Hi, I’m really new to unreal engine and currently learning it by watching youtube tutorials.
I am now on this part (youtube link (the official unreal engine tutorial) :

I followed every step that the video said to do but for somehow materials doens’t reflect other brushes like in the video (3:00).

I searched about this poblem but seems everyone who watched the tutorial did not have the problem that I have.

can you help me to solve this problem? I attached a screenshot below.

Make sure scalability is set to epic. Make sure there’s reflection capture actors and screen space reflection enabled in post processing.

I replied before but seems my reply is not on. It worked! Thanx :wink: