HELP help HELP !!!!!!

Hi Experts,

I am in a trouble.

sh3d file downloaded from sweethome3d online shows as damaged while trying to open in desktop app. Its shows 3 options - Don't open ...., Replace ...., Remove
and if I try last 2 options either it removes some parts or opens with red colour for some parts

But I can view and edit the same file online without any issues

If I try upload the damaged file back to online then it shows

Couldn't import home Lavendula-Aframe-40x65-Corrected1
Error 43: Can't read home