Official Sharp Discussion

Hi everyone, I found the foothold but cannot make it work… I’m stuck with a credential error using a specific tool (easily found on google) to exploit it… Which is weird is when using the code found on the box I don’t have this credential error. Can someone give me a nudge please ?
EDIT : Rooted.
Thanks to @sicario1337 for the help on User and as mentionned @CasperGN : don’t forget to disable your firewall (it helped me a lot)…
Root was a piece of cake compared to user.