Newer versions open with a bunch of errors.
Luckily there's a patch ( https://bugs.winehq.org/show_bug.cgi?id=50362#c16) but it hasn't been merged into vanilla Wine yet and you have to compile it yourself.
I did so with wine-tkg (fork) and it works!
You can get it here: https://github.com/kajlando/wine-tkg-fl-studio-20.8-patch
I hope this helps!