No smoothing group information was found when importing obj file in UE4 When I try to import my obj file in Unreal I keep getting this error.

"No smoothing group information was found in this FBX scene. Please make sure to enable the 'Export Smoothing Groups' option in the FBX Exporter plug-in before exporting the file. Even for tools that don't support smoothing groups, the FBX Exporter will generate appropriate smoothing data at export-time so that correct vertex normals can be inferred while importing."

I never got this error when I used Blender 2.78b, so I make models in 2.8 and after that I import obj file to 2.78b and export as obj again with same settings with this Unreal doesnt show any error messages.

But I dont want to go 2.8 then 2.78b then Unreal.

Right now when I export a obj file I chose this boxes.

Selection Only : Depends

Animation : No

Apply Modifiers : Yes

Include Edges : Yes

Smooth Groups : Yes

Bitflag Smooth Groups : Yes

Write Normals : Yes

Include UVs: Yes

Write Materials : No

Triangulate Faces : No

Write Nurbs : No

Polygroups : No

Objects as OBJ objects : Yes

Objects as OBJ Groups : Depeds

Material Groups : No

Keep Vertec Order : No
Set Smoothing under the Geometry tab to Face in the FBX export settings when exporting.