I am having a problem with machine BLUE

can some help me out please. I have done the first steps and by researching knew which exploit i should use, and i verified it from the walkthrough.

my problem is once i run the exploit, i get a successful connection but then it dies in a second. not sure what is the problem and tried searching but no solution. Thanks for your time.

that 's what i get
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command shell session 1 opened …
RubySMB::Error::CommunicationError