Unreal engine marketplace meshes have light bugs?!

I bought the POLYGON - Samurai pack from unreal engine marketplace made by Synty Studios. I made my first scene with this pack and after lighting build one mesh has lighting bugs. You see it on the image below!
20 dollars for a pack with light errors? How can I fix this or why is this?

I think this is a lightmap error. Try to use a higher Lightmap resolution.

If it doesnt work you probably have to create a second set of UVs for the Lightmap.

I hope I was able to help you. Good luck.

PS: you can also use dynamic lights that way you dont need any lightmaps

looks rather how I expect it to look from the images on the marketplace page.
though yes, some of the shadows there do look off.
does it look like that in the preview/showcase scene? maybe you missed something.

You could try to contact the author either trough the forum post promoting this package, or email. the comments on the marketplace do not fire of an email so chances we marketplace creators know about new comments are low. best to email/post on forum.

if it was intended this way you can post a comment on the marketplace page, and give a rating.
if the creator does not respond within reasonable time (few days - week) or is offensive (always be polite yourself of course) then you can take it up with the marketplace admin team.