Used the first one here. They were complaining about Luma 3ds 8.0 exception handling on the cfw board here. so I thought their problem could be related to mine. Others are recommending to update instead to 8.1 but I'm gonna stick with 7.1 for now.
https://jenkins.hakujou.fr/job/3DS/job/Luma3DS-Legacy/
https://jenkins.hakujou.fr/job/3DS/job/Luma3DS-Legacy/