To avoid this problem you need to convert the SVG file to an EPS. To do so, we recommend using Inkscape (a free program).
Open the floor plan in Inkscape,
Select File > Save as
In the saving pop up window, at the bottom, you can select the file type from the drop down menu. Select Encapsulated PostScript (.eps) and save
Open the EPS file in Corel
Other alternatives
Our SVG floor plan can be opened and edited in various third parties apps. Check our article if you want to know more.