RT-AC5300 wireless internet connection

[Hisservant]

I have a small but spread out network encompassing 3 locations connected with long range wireless bridges. I have one AC5300 as the main router and another AC5300 set as an accesspoint in another building and a RT-N300 set as an access point in another building. The ethernet connects fine all around, but the wireless connections shows no internet - "Connected without internet".