- May 12, 2022
I'm not totally sure what changes you were making, but I don't recommend editing the reserved partition if that's what it was.I managed to get my raven in a state that even DFU can't fix. The ./amlogic-usbdl image boots ok via DFU, but any of the ./update bl2_boot images eventually result in this
I have an old bootloader that I made that exits into fastboot mode a little bit earlier than the bootloaders included in the OP. Let me know if that gets you past the crash, in which case I can compile one to dump you into update mode instead.
If you want to flash the magisk patched boot image to the Cube, you need to create a new patched image with Magisk Manager, and leave both recovery and vbmeta unchecked. Also, if you don't have a bootloader exploit to bypass verified boot, the bootloader will always reject modified boot images, which is the signature check fail you are seeing.