Hello,
The logs are not concluside unfortunatelly. At the same time we can see the device authenticating sucessfully and then dropping with reason code 1
I advise you to upgrade de WAP to the lastest version and observe.
Dec 31 17:04:28 info hostapd The wireless client with MAC address a4:6b:b6:ec:7a:d4 has been successfully authenticated.
Dec 31 17:04:28 info hostapd wlan0: STA a4:6b:b6:ec:7a:d4 WPA: pairwise key exchange completed (WPAv2)
Dec 31 17:04:28 info hostapd wlan0: IEEE 802.11 STA a4:6b:b6:ec:7a:d4 associated with BSSID 64:ae:0c:ee:79:20
Dec 31 17:04:28 info hostapd wlan0: IEEE 802.11 Assoc request from a4:6b:b6:ec:7a:d4 BSSID 64:ae:0c:ee:79:20 SSID Televia Periferico
Dec 31 17:03:45 info hostapd wlan0: IEEE 802.11 STA a4:6b:b6:ec:7a:d4 deauthed from BSSID 64:ae:0c:ee:79:20 reason 1