@Kevin_Z Thanks☺️☺️☺️😍😍😍😍 Finally working... In my i find out my AP isolation as named Client Isolation.. I unfortunately was not known that.. Thanks to tp- link community.

@vBDKv I have the same problem , I couldn't connect to my printer to my mobile or laptop , my router model number is TP-Link Wireless N Router WR840N , but I can't find the AP isolation feature. ....