It's most likely because your internal storage is encrypted, and in PE12 the encryption is disabled as said by the dev since we don't have any good recovery yet. You need to format data not just wipe it. In TWRP when you choose Wipe menu there are Format Data on the right that you can choose to remove the encryption.Could not update to PE12 from PE11 plus edition. Wiped data, dalvik, cache, system, vendor, internal storage, then flashed PE12 and gave me ERROR.
Someone help me out here...do i need to go back to Stock Rom? if so, please link me?
edit: have twrp 3.6, still no sucess, giving ERROR.