A Rise course to Thinkific

Can anyone tell me how to upload a Rise 360 course into Thinkific? I have tried via the web with an external host as well as Thinkific, and I get Neither to work.  According to Thinkific, the HTML link has to be directly in the zip file, not a file within a file. So when I go to upload, I get an error saying that the HTML (index.html) can not be found. I found a video that says a SCROM file can be uploaded, but I am unable to get that to work because there is no HTML file to be located within the zip file. Can someone please help me? I researched compatibility, and everything I read states that it is, however, I am missing something somewhere because I have tried everything I have had my hands on and still can't get it to work.