You seem to have forced-installed your IO::Async, with result as good as described below. Calmly analyse logs, don't panic, the "force" option is there for a reason. Looks like Future::IO can depend on IO::Async, not the other way round -- with the latter providing implementation (one of) for the former. At some point on route to current 0.802 version, the IO::Async became to require Future::IO as pre-requisite, unnecessarily. Future::IO, great otherwise, seems to dislike Windows.

If absolutely loath to force, you can download IO-Async-0.802.tar.gz, unpack, delete line#30,

del t\70future-io.t
cpanm .
[download]

then enjoy your clean (according to stranger on Internet advice, worth as such, of course) installation