Wi-Fi Security
The log says associated, but the device still cannot send application data. In Wi-Fi, the problem is usually that the security stage has not finished. scan -> authentication -> association only attaches the terminal to a BSS (Basic Service Set). What makes the data plane usable is the key-establishment and key-installation process that follows.
Wi-Fi security ties together password mode, handshake flow, management-frame protection, and compatibility.
The core of Wi-Fi security is establishing a verifiable link, installing keys, and enabling the data plane after basic access is complete.
Where It Sits in the Access Path
In the most common STA -> AP flow, the security stage comes after association and before the data plane: