mm43:
AP engagement is inhibited when the FMGEC receives the "pitch angle protection active" information from the FCPC.
IMO they mean: activated (in NORMAL LAW θ <-15° or θ >25/30°)
This is outside APs own Operational Conditions θ >10° and θ <22° which are also valid in ALTERNATE.
OK465:
In the interest of quality simulation I'm not quite willing to accept either one or the other just yet.
Text is from AMM, but you have reason to question this based on your sim experience.
Are you able to verify this in NORMAL LAW condition in the sim?
AP & A/THR off,
NORMAL Law (to make sure VLS available),
fly CAS<VLS-5 and then try to engage AP....?