I fixed it. Go to hi honor and search for honor 5x firmware, download it unpack it put the update.app on dload on microsd make sure you flashed stock recovery through fastboot hold power + volume down + volume up until it vibrates and done. I couldnt install any dload file on XDA the error "system failed" means the update is not for your device. The one on hihonor was the only one that worked for me ive been bussy 3 days its worth trying. I can link/upload you the download and instructions if you want to but ill do it tomorrow.I didn't say you had to move yourself to a technical support but place a phone call or mail them. You should find their phone number or their email address from your the Honor Website.
I'll do it myself by tomorrow...