Possibly, when you root your phone to flash new ROM/firmware, you may get stuck at Custom Binary(recovery) Blocked By Oem Lock. If you modified other internal settings on your phone, or flashed a binary file on your smartphone, the device is preventing itself from booting as it has ...
Your Android Device should be rooted and you should have the custom recovery like TWRP installed on your device. Don’t forget to take a full backup of everything on your device before installing any Custom Pie ROM. That way, you would be on the safer side just in case something gets wr...