Answers

@technonicx user I think the phone has become brick and write on the internet. You need to go back to stock rom

@technonicx user As soon as you remove the battery and insert it back, try pressing the recovery mode keys. Try cleaning the partitions and reinstalling the ROM.

@technonicx user

@technonicx user Switching from AOSP to stock ROM is troublesome. The flash program does not install the stock ROM because it sees a different-based ROM on the phone. Install custom stock based ROM from Recovery then try again.

@technonicx user I can't set it up. The computer does not see TWRP.

@technonicx user Which version of TWRP are you using?

Maybe you are insterested