[CM13 post-MM] Flashing in TWRP auto-reboots phone into recovery - help!

[radiobacter]

I was running the 8/3 update of Cyanogenmod 13 just fine on my L24. I downloaded the 8/13 nightly from the CM website and tried to flash it, but for some reason it returned error 7, which shouldn't happen because I already updated to EMUI4/MM firmware two weeks ago (as evidenced by me running the 8/3 version with no problems). However, when I then tried to boot back into system, the phone instead booted back into TWRP. Trying to boot into system in any way (from TWRP menu, through bootloader --> fastboot reboot, et cetera) just reboots the phone right into TWRP again. -_-

Now, I can access only TWRP and bootloader, but whenever I try to flash a .zip in TWRP it immediately reboots back into TWRP. I've tried reflashing TWRP (newest version and older versions), flashing the Cyanogenmod recovery for kiwi, factory resetting, and even reflashing the stock recovery and trying to return to stock EMUI. None of these have worked. (And yes, of course I've tried clearing cache/dalvik.)

At this point I'm just looking to actually boot into system...If anyone has any idea how I might be able to fix this, it would be great.

EDIT: to clarify, when I try to flash the ROM in TWRP, I get the following:
updating partition details
full selinux support is present
MTP enabled
and then an immediate reboot. This is very fast - I had to take a video of it and then freeze the frame to see what the message was.

 

[Puddi_Puddin]

Boot in fastboot and install your crap? Turn phone off connect to your PC hold Power and volume down until it boots.

 

[radiobacter]

Thanks for responding!

Could you explain what you mean? I can easily get into fastboot, but I'm not sure what I should be installing. Trying to install the ROM gives me the android-info.txt/android-product.txt missing error, which makes sense because it's not a fastboot ROM. What file should I be installing through fastboot?

 

[clsA]

Thanks for responding!

Could you explain what you mean? I can easily get into fastboot, but I'm not sure what I should be installing. Trying to install the ROM gives me the android-info.txt/android-product.txt missing error, which makes sense because it's not a fastboot ROM. What file should I be installing through fastboot?

fastboot flash recovery twrp.img
reboot with power + volume up and down

from TWRP
Install / yourRom.zip
Install / gapps.zip (if needed for cm13 based roms)
reboot / system

enjoy

 

[radiobacter]

fastboot flash recovery twrp.img
reboot with power + volume up and down

from TWRP
Install / yourRom.zip
Install / gapps.zip (if needed for cm13 based roms)
reboot / system

enjoy

Again, the issue is that I can't install any ROM through TWRP, because trying to instantly reboots the phone and brings me back into TWRP. I've tried reflashing TWRP, but it doesn't do anything.

 

[radiobacter]

Update: I fixed it! For some reason TWRP was recognizing my SD card up until I started flashing. I just put the ROM in my internal storage instead of the SD card, and then the ROM was flashed with no problems. Thanks to those who tried to help me out!

 

[clsA]

Update: I fixed it! For some reason TWRP was recognizing my SD card up until I started flashing. I just put the ROM in my internal storage instead of the SD card, and then the ROM was flashed with no problems. Thanks to those who tried to help me out!

The phone is known to be finicky about sd cards. Try formatting it with TWRP

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