I'm using structure to build out a site. The site is in a sub folder for development. I can't get structure to write the correct paths. I have the menu showing the pages I've entered but the url just shows as 

    example.com/page/sub-page 

when I want it to look like 

    example.com/sub-folder/page/sub-page. 

If I go to 
    
    example.com/sub-folder/page/sub-page 
I get 
    
    Error
    The page you requested was not found 
Am I missing something obvious or is there something more complicated about having the site in a sub folder with structure? 

Thanks!