I'm having the same issue. I wonder if updating homebrew would do any good, but also i'm unsure how to update homebrew properly. What version of homebrew are you using?
I'm not having any luck installing luma, so i thought maybe if i upgrade homebrew 1.1.0 to 1.1.1 it'd help? But i can't find out how to upgrade it, anyone have any ideas? or know how?
Yes, i'm having the very same issue, on the yellow screen on both savemanager and JKSM. I'm at a loss too =( I've been searching for various answers, if i find anything i'll definitely post here.