IEEE 802.11:deauthicated due to local deauth request Respberry pi 2 jessie

i trying to make hotspot by using respberry pi 2 ,i have followed a video tutorial in which i have completed all steps successfully. The Router that i have is TL-WN722N. Actually i'm facing an issue is that when coecting to the Devices on other side my Respberry pi Terminal throws an error

wlan0: STA here My MACAddress IEEE 802.11:deauthicated due to local deauth request ? i don'nt know much about networking but this is my first RespPi Experience. If any one will further evaluate my Problem it would be appreciated