Blender to Unreal Engine Fbx problem

Summary

Hello People i have a problem About Blender to Unreal Engine 5 (both of them is new versions) So my problem is when i Export an FBX in blender And import it in Unreal Engine material goes half black and its not about flipping sides or doing all transforms and i did not even model anything just the cube that when you open a new project i just delete the camera and light and just give it a base material i mean like just changed base color guys from color panel and thats it i did the export choices like everyone does and its still a problem just when we do Unlit it works but without it its a big problem anyone please help me and my older brother need this we wanna make a game but this problem is killing us

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Documentation

Steps to Reproduce

i did everything i can

Expected Result

it has to be look like blender innit?

Observed Result

you can see in the Lit Purple Cube PNG

Platform(s)

we use Computer (i dont know what to write here XD)

Upload an image

Purple Cube.fbx (15 KB)