Hello !
Please , use this update_kernel , now your issue should be solved !
Into TWRP, after you checked Install CM12.1 ( last update ) , please check Add More Zips ( now check update_kernel ), right now you can "Swipe to Confirm Flash" .
Please, let me know if your device boot into CM12.1 .
Downloads :
update_kernel.zip md5 : 64cc73cd798dfcbc0a1e15dbebabf3c6
Good luck !
