The message "loader for iphone9 3d101ap not found better" suggests several possible underlying causes:

The "Loader" is a small piece of code sent to the device’s RAM to facilitate communication between the hardware and your computer. When your software reports "3D101AP not found," it means the program cannot locate the specific bootloader file required for that hardware ID.

for the iPhone SE 2nd gen). It may refer to an internal component identifier or a non-standard prototype part. The Apple Wiki Identifying Your Charger (Loader) Since the device you are likely using is the iPhone SE (2020) , it uses a Lightning port

The --loader-fix flag bypasses version checking for the NAND controller.

In-the-wild iOS Exploit Chain 1 - Google Project Zero

Here is a comprehensive guide to understanding why this happens and how to fix it to get a better, seamless restoration or jailbreak process. Why Is the Loader Missing?

This error typically occurs for three reasons: