i want ota update work topic

i have htc m8_tl
china model
it's s-on
and i replace custom recovery to stock recovery
and remove root
but after the ota download complete it say that in pic i attach
from one month i download it and it reboot after download but faield to flash cuz i was in custom rec
but now i have stock and the phone not reboot to flash it and say ur phone run in modified version

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