I had the same experience, and followed the instructions to call QB Technical Support. The helpful person who answered my call explained that this is an on-going glitch in their programming. The solution is for Intuit's data conversion crew to upload my file (converted from Mac for Windows) and do something to it themselves. They'll email with instructions for re-downloading and installing when their process is finished (48 to 72 hours).
So the only solution to this problem appears to be to go through Technical Support.
I am installing files created in the 2016 version of QB Premier for Mac on a brand new copy of QB Premier for Windows 2019.