Ros2 Custom message - No such file or directory

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Hello everyone. I'm trying to build custom message in foxy distribution And gets an error: No such file or directory when i do colcon build.

the error is :

Starting >>> motor_interface
--- stderr: motor_interface                              /home/koby/spot_ws/src/Rexy_motor_control/src/motor_control.cpp:8:10: fatal error: motor_interface/msg/leg.hpp: No such file or directory
    8 | #include "motor_interface/msg/leg.hpp"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[2]: *** [CMakeFiles/motor_control.dir/build.make:63: CMakeFiles/motor_control.dir/src/motor_control.cpp.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:123: CMakeFiles/motor_control.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:141: all] Error 2
--- Failed   <<< motor_interface [0.84s, exited with code 2]

Summary: 0 packages finished [0.92s]   1 package failed: motor_interface   1 package had stderr output: motor_interface

The error only appears when I try to import the msg in a CPP file. When I import the msg in a python file it works fine.

the import in the cpp file:

#include <chrono>
#include <memory>
#include <cstdint>
#include "rclcpp/rclcpp.hpp"
#include "std_msgs/msg/int16.hpp"
#include "std_msgs/msg/int16_multi_array.hpp"
#include "motor_interface/msg/leg.hpp"
#include <JHPWMDriver/src/JHPWMPCA9685.h>
#include <vector>

the message is :

Leg.msg 
        string name
         int16[] id
         float32[] pos
         float32[] vel

the CmakeList:

cmake_minimum_required(VERSION 3.5)
project(motor_interface)

# Default to C99
if(NOT CMAKE_C_STANDARD)
  set(CMAKE_C_STANDARD 99)
endif()

# Default to C++14
if(NOT CMAKE_CXX_STANDARD)
  set(CMAKE_CXX_STANDARD 14)
endif()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

# find dependencies
find_package(ament_cmake REQUIRED)


include_directories(include)
ament_export_include_directories(include)

find_package(rclcpp REQUIRED)
find_package(rclpy REQUIRED)
find_package(std_msgs REQUIRED)
#for the costom msg
find_package(rosidl_default_generators REQUIRED)

rosidl_generate_interfaces(${PROJECT_NAME}
  "msg/Leg.msg"
  "msg/LegList.msg"
 )

add_executable(motor_control src/motor_control.cpp  include/JHPWMDriver/src/JHPWMPCA9685.cpp)
ament_target_dependencies(motor_control rclcpp  rclpy std_msgs)
target_link_libraries(motor_control ${catkin_LIBRARIES} i2c)


#target_link_libraries(motor_control ament_index_cpp::ament_index_cpp)
#rosidl_target_interfaces(motor_control ${PROJECT_NAME} 
#"rosidl_typesupport_cpp"
#)


install(TARGETS
  motor_control
  DESTINATION lib/${PROJECT_NAME})



# uncomment the following section in order to fill in
# further dependencies manually.
# find_package(<dependency> REQUIRED)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  # the following line skips the linter which checks for copyrights
  # uncomment the line when a copyright and license is not present in all source files
  #set(ament_cmake_copyright_FOUND TRUE)
  # the following line skips cpplint (only works in a git repo)
  # uncomment the line when this package is not in a git repo
  #set(ament_cmake_cpplint_FOUND TRUE)
  ament_lint_auto_find_test_dependencies()
endif()

ament_package()

the package:

<?xml version="1.0"?>
<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
<package format="3">
  <name>motor_interface</name>
  <version>0.0.0</version>
  <description>TODO: Package description</description>
  <maintainer email="kobylivne@gmail.com">spot-micro</maintainer>
  <license>TODO: License declaration</license>

  <buildtool_depend>ament_cmake</buildtool_depend>

  <test_depend>ament_lint_auto</test_depend>
  <test_depend>ament_lint_common</test_depend>

<!--for the costom msg-->
  <build_depend>rosidl_default_generators</build_depend>
  <exec_depend>rosidl_default_runtime</exec_depend>
  <member_of_group>rosidl_interface_packages</member_of_group>


  <export>

    <build_type>ament_cmake</build_type>
    <depend>rclcpp</depend>
    <depend>std_msgs</depend>

  </export>
</package>

any idea how can i fix it?