Cross-compiling Arm NN for the Raspberry Pi and TensorFlow issue

Hello, I'm starting my pi 4 model B project and following this instruction: https://developer.arm.com/solutions/machine-learning-on-arm/developer-material/how-to-guides/cross-compiling-arm-nn-for-the-raspberry-pi-and-tensorflow/single-page. When I came to "Building Arm NN" ,I have this problem

I wonder if there is a version issue there?? Please help me.

More questions in this forum