Red Triangle OTA Update s-on unlocked bootloader. topic

hi everyone,

Today i've got the android 5.0 update for my beloved HTC One M8! (yeah!) But the problem is that i can't install it because i get a red triangle after 1-2 min. I have a HTC One M8 with unlocked bootloader and s-on. I really hope someone can help me because i would love to be able to update :(