I accidentally delete my HTC one M9+ OS

By any chance my HTC one M9+ operating system deleted ,

Now phone is directly booted to download mode only , twrp of HTC one M9+ already installed .

Its
ERR
htc_hiau_ml_tuhl
CID-HTC__038

In download mode a prompt flashing
file /mnt/media_rw/ext_sd/0PK7IMG.zip file not found.

i tried to flash M9 os but its not working , please help me to get OS.

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