The access point support passive poe only, and there should be a P assive PoE Power Injector in the package

it would better if you could write in english, or most people cannot read or reply

the TL-WN851ND is not compatible with windows 10

is your adapter v4? you may also try to change wifi channel and channel width on your router

since there is no official windows 10 driver, the windows system might have already built in its driver or will install it automatically, did you check the device manager?

even though you are using static ip, but the 10.4.219.* is a private ip address which means there must be another NAT product in the front(it might be on your isp end) which will protect the local...