ROOF MISSING & DOWNLOAD ISSUE

Hi Everyone,


I’m new to Twinmotion & am having a few hiccups!
This was working fine but all of a sudden my model isn’t showing the roof in Twinmotion- I’m using SketchUp Pro 2024. It has also detached two parts of my dining chairs also. Please see image attached.
The other thing is I have tried for days to download & use Megascan objects but I continue to get the error - Download error. Please retry.

I’d really appreciate any help!

Thanks,
Em.