You have to flash with twrp 3.0.0.1, it worked for me
Install twrp 3.0.0.1
Wipe cache, dalvik, data
Flash image
And it should work
Enviado desde mi 2014813 mediante Tapatalk
Hi.
Same Happened to me.
I got stuck on 6.1.28 with no ota updates( don't know why)
Yesterday I installed 6.1.24 via TWRP and everything is ok
Greetings!