Can't convert my scene to 4.18

Hi

I have 2 computers, an old laptop at work (8g ram) , and a high end desktop at home.
I’m working on an architectural scene, i started with UE 4.15 , and now i’m using the 4.17 one .
But when i tried to switch to the new 4.18 version, i had a problem !! In fact, the conversion went well at home on my high end desktop, but when i try to convert it on my laptop or even use the converted one from my desktop, it won’t work, it won’t even start ! it stuck at 94% of loading, the cpu goes 100% … and then it crashes.

It’s ok now !! the 4.18.1 version solved the problem