Enter Arrow os recovery, did factory reset and switch from current slot. Then it will boot stock rom, skip everything and i did factory reset from setting and it boot into twrp. I press vol down + power button (twrp boot can't touch) until it restart and release it. Boot into twrp again, i factory reset and adb sideload selected rom. After that follow instruction from OP's as usual.
/* * We are not responsible for bricked devices, dead SD cards, * thermonuclear war, or you getting fired because the alarm app failed. Please * do some research if you have any concerns about features included in this ROM * before flashing it! YOU are choosing to make these modifications, and if * you point the finger at us for messing up your device, We will laugh at you. * It is your fault because you chose to do all the modifications on your device. * Remember projects like these and the work done on them is a hobby to the * contributors and the team members, no one is working for you nor is getting paid for it * have some respect for the work done by them since it is done purely on interest or a hobby */