Support team Help me ........
Sorry for the inconvenient,
This is known bug especially ext_csd with different boot and rpmb size, we will be fix it asap.
For now, you may try to set boot config manually or via preset menu in ext_csd tab according to your SoC platform.
Y15S UFI DUMP FILE NEEED
This is Mediatek devices right?
You probably don't need a dump file to turn on this type of device.
All you need is the official firmware with the scatter file,
then you can direct write your chip in the UFi eMMC ToolBox via the Factory Image menu.