Lightning build goes to 99% and stays there

I have started doing the Studio Lighting course (Epic Games) from the academy. So when it came time to bake (I baked at the preview quality) it goes to 99% than my CPU goes to idle and nothing. The swarm agent keeps runing and the engine is responsive and works just fine but the bake just does not end. I have left it runing for 10 hours and it just keeps going. I’m runing W10 with AMD FX-8150 8G RAM GTX1060-6G on a SSD. I dont mind long build times I just want to know will it ever complete if I leave it run or if there is any solution to this?

So it turns out that on uploading the project someone decided to override the resolution for couple of the objects. With that settings my pc would have rendered the scene in about 2 months. On one hand that was a stupid thing to do but on the other I learned something while trying to find the problem. If you open the “statisics” from the “window” drop down you can see the lightmap resolution for all the objects in the scene.