Bisexuality is in the "Untested" section, not "Broken", which means that it
should work, but is not guaranteed.
"Meta.json cannot be validated" just means that the mod doesn't have a meta file, which is just the mod's "business card" that's displayed on the Mods screen of the game menu (see the attached screencap below for an example). It doesn't mean that the mod doesn't work, just that the mod's author hasn't included that "business card" thingamajig.
If you try the mod and get errors,
then it would classify as Broken, and would need to be moved there, especially since the mod's author has been AWOL for a while, meaning that there's little chance of them fixing the mod (though someone else could always do it if they feel suitably motivated).
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