Error when building package with ROS2 Foxy and colcon build

[duochh]

Here is my log when I build 2 packages in ros2 foxy and colcon build:
-----------------------------------BEGINNING LOG-----------------------------------------
Starting >>> ros2_unitree_legged_msgs
Finished <<< ros2_unitree_legged_msgs [8.01s]
Starting >>> unitree_legged_real
--- stderr: unitree_legged_real
-- CMAKE_SYSTEM_PROCESSOR: x86_64
/home/ubuntu/ros2_ws/src/unitree_ros2_to_real/src/ros2_walk_example.cpp:6:10: fatal error: unitree_legged_sdk/unitree_legged_sdk.h: No such file or directory
6 | #include "unitree_legged_sdk/unitree_legged_sdk.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/ros2_walk_example.dir/build.make:63: CMakeFiles/ros2_walk_example.dir/src/ros2_walk_example.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:109: CMakeFiles/ros2_walk_example.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
/home/ubuntu/ros2_ws/src/unitree_ros2_to_real/src/ros2_udp.cpp:6:10: fatal error: unitree_legged_sdk/unitree_legged_sdk.h: No such file or directory
6 | #include "unitree_legged_sdk/unitree_legged_sdk.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
/home/ubuntu/ros2_ws/src/unitree_ros2_to_real/src/ros2_position_example.cpp:6:10: fatal error: unitree_legged_sdk/unitree_legged_sdk.h: No such file or directory
6 | #include "unitree_legged_sdk/unitree_legged_sdk.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/ros2_position_example.dir/build.make:63: CMakeFiles/ros2_position_example.dir/src/ros2_position_example.cpp.o] Error 1
make[2]: *** [CMakeFiles/ros2_udp.dir/build.make:63: CMakeFiles/ros2_udp.dir/src/ros2_udp.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:82: CMakeFiles/ros2_position_example.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:136: CMakeFiles/ros2_udp.dir/all] Error 2
make: *** [Makefile:141: all] Error 2

Failed <<< unitree_legged_real [1.21s, exited with code 2]

Summary: 1 package finished [9.37s]
1 package failed: unitree_legged_real
1 package had stderr output: unitree_legged_real
----------------------------END LOG---------------------------------------

I think you should check your CMakeLists.txt file in package unitree_ros2_to_real. The include_directory() may not contain the correct folder path.