I can't colcon build the workspace

[Axin630]

Starting >>> ros_tcp_endpoint
Starting >>> unity_slam_example
--- stderr: ros_tcp_endpoint
CMake Error at CMakeLists.txt:4 (find_package):
By not providing "Findcatkin.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "catkin", but
CMake did not find one.

Could not find a package configuration file provided by "catkin" with any
of the following names:

catkinConfig.cmake
catkin-config.cmake

Add the installation prefix of "catkin" to CMAKE_PREFIX_PATH or set
"catkin_DIR" to a directory containing one of the above files. If "catkin"
provides a separate development package or SDK, be sure it has been
installed.

---

Failed <<< ros_tcp_endpoint [0.35s, exited with code 1]
Aborted <<< unity_slam_example [0.75s]

Summary: 0 packages finished [0.96s]
1 package failed: ros_tcp_endpoint
1 package aborted: unity_slam_example
1 package had stderr output: ros_tcp_endpoint