What happens when we try to flash custom ROM via stock recovery

What happens when we try to flash custom ROM via stock recovery to flash additional zips please reboot recovery to switch to the update slot Flashing AB zip to inactive slot: A To flash additional zips, please reboot recovery to switch to the updated slot Error installing zip file With AB tom horn slot provider slot: B Devices on super may not mount until rebooting recovery To flash additional zip please reboot recovery to switch to the update slot

tom horn slot provider TWRP Recovery offers additional features over stock recovery The zip will install TWRP to both boot slots 6 Once done, reboot

top jili slot game For the first time it said unable to repare, then I changed filesystem to exFat then to ext4 again 2 Turn OFF UPDATE RECOVERY in DEVELOPER OPTIONS