help HTC one m8 cid:eek:RANG001 version-main: empty

hey guys i need help i buyed an HTC one m8 and i found in it a custume rom ( candy5 ) i would to get back the stock one i read in a thread that i must see the firmware version but i dont have one it's empty !!! what should i do help me plz
PS: i'm S-ON :crying:

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