FAIT may not work on 3.2.1. I won't have time to really check for a couple of days, though.
Edit: Did a super-quick check on 3.2.1, and it starts up for me using the default config, and my own personal settings. Can you paste your config settings in a spoiler? I don't have time to test a bunch of config settings on my end, but I can at least try your specific setup that's having problems.
I don't believe FAIT can do that right now, unfortunately
Ive solved the issue, I didnt have winrar downloaded so i was using a .rar online converter, and it wasnt converting it correctly, the .json file was empty. But i downloaded winrar and it worked that way.