Attack mode "d" not working

[Tuxuis]

Hello. I recently installed mdk4 and tried to run the deauthentication attack mode but I get no output. The same thing happened when I specified an ESSID and BSSID. (sorry for the blurry screenshot)

[Rafa841]

working on 2.422 but no working on 5.765 Ghz

[Rafa841]

if a target use router dual band wifi 5 not working