Cesium 3D Tile set not packing UE 5.4.2 Clean project

Hello! First post.
I lost a whole morning trying to figure out what´s goin on. I give up.

As title says.
1 - I created a clean C++ project in UE 5.4.2.
2 - Login to Cesium - Add a 3D tile set.
3 - 3D Tileset work normally on viewport - PIE
4 - Pack project - output log 0 errors
5 - Execute pack - No Cesium.

Need help on this.
Thanx

Solved.
Migrated content to the project, pack, and Cesium worked.
Don´t know what happened, but is working now.

Regards.-