stuck in Recovery mode

[cheivs]

I made the terrible mistake of delete the Original ROM from recovery TWRP on my HTC DROID DNA, after a few days I found the way to install a new ROM (NuSense SIX) through sideload. However once I flashed I make a reboot and always enter to the recovery. Every time a try to start the system always enter to recovery and some times ask me to fix the root permissions because it shows me a message that says something like this... root permissions seems to be lost.... do you want to fix it? And I say yes. However nothing happens and again starts and enters the recovery.

What can I do? I'm not an expert in this not even a hacker...please need help

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