I have reproduced the problem, and it's because there are more references to the HTTP port than just in hfs.ini, you're not supposed to change it like that.
You have to stop whatever is running on port 80, setup FHFS like normal, then change the HTTP port once you get into the admin console.
Then you can restart whatever you had running on port 80 before.
You have to stop whatever is running on port 80, setup FHFS like normal, then change the HTTP port once you get into the admin console.
Then you can restart whatever you had running on port 80 before.