Hi Agilardo](https://forums.unrealengine.com/member.php?34706-Agilardo) , What are the steeps you do before get this error , I can’t replicate. Maybe you can give me some clue.
I add this simple meshes and press the export button with the same settings you have “export tools” , “static” etc…
Try to re-download and reinstall, Maybe help, really I not remember if I did some change just after the release, so do it just to be safe 
Greetings! I wait for more info