Why do I have a red exclamation mark in recovery when updating to Lollipop (HTC One M7)?

[AC Question]

Red Exclamation Mark in Recovery When Updating to Lollipop (HTC One M7)

Details of device:
HTC One M7
Unlocked Bootloader
S-ON
HBOOT 1.55

I had originally tried flashing TWRP but failed a few weeks ago and gave up on rooting. Today, I finally got the OTA for Lollipop on my phone and when I tried to update, I ran into many problems. I ended up finding what I think is a stock recovery image and I flashed it.

Now, when I do the update, I get the red exclamation point (on a picture of a phone) and my phone eventually just reboots.

What is going on, and how I can I get the update to work?

Thanks!

 

[Akashymon The Viola Penguin]

Re: Red Exclamation Mark in Recovery When Updating to Lollipop (HTC One M7)

Find your stock OS. Reflash the entire phone to stock (including relocking the boot loader) then install the update

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