STL cannot be opened as a solid body

It works for me.

I opened it in v2013, and found problems with several of the faces using "Import Diagnostics". The problems could be repaired using "Attempt to Heal All".

I suggest you open it again and answer "Yes" when it you are asked to use "Import Diagnostics".

OR,

If the object is already open in SolidWorks, right click on the object in the Feature Manage and choose "Import Diagnostics"

Then select "Attemp to Heal All"