Unhappy [Q] can u help me pls pls

Hi modretors I hade a galaxy tab 3 10.1 gt-p5210 wifi only I made aroot for it ..but when I used a apps need root premision like dsploit or wifikill it take the primision and it just not work like wifikill or I gate this message in dsploit ....u can see the message in the attachment ....pls help me ireally neec u help ....thanx what this due to?how can I fix it ?
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