rainbow colors in lightmaps

Hi, I have a problem when baking lightmaps. I am working on a model of a house, the entire model looks great with no errors but for some strange reason I have some weird colors showing in just an area of the model. how come? I’ve never seen something like this before. I thought you can only have black edge bleeding, I also checked the UVs and they are ok.

Looks like you’ve got the normal plugged into the wrong socket in the material.

there are no materials in the scene, I only baked the lights and I am viewing the model through “lighting only” mode. I also forgot to mention that I am using the version 4.26 rendering-branch with GPU lightmass plugin.

Try it in a previous version.

I wish, I tried to move the project to 4.25 but it doesn’t allow me to do that. Is there any part of the forum dedicated to the GPU lightmass version of Unreal?

Thank you

“FileVersion”: 3,
“EngineAssociation”: “4.25”,
“Category”: “”,
“Description”: “”,

Open your project file “yourprojname.uproject” text redactor and change the line 2
“EngineAssociation”: “4.26”
“EngineAssociation”: “4.25”