Default Ask multi tools

I am trying to help my friend with his Rom as I have some xperiance from the note 2 I got a new computer running windows 7 I installed the android sdk, the Java sdk, and apk multi tools set it up as normal but when I try to decompile anything I keep getting errors and can't decompile anything I was wondering if someone could tell me what I'm doing wrong or tell me what I did not setup correctly I set it up according to a guide here on xda that I used the first time I have team viewer if some can help me I would greatly appreciate it

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