ERROR:7

[xiaoyaoz1]

my trwp v is 3.6.2_9-0

install→→→cm14.1-mido-firmware-20170430,add lineage14.1-20170921,→→→install zip saifishos 3.0.0.8 or 2.2.1.18 --------but Failed-Updater porcess ended with ERROR7,why？How can I solve this problem