An error occurred during catkin_make.

[jz068]

Hello, sorry to bother you. I downloaded the project and run it on ubuntu20.04, where I found two suspicious points. 
1 indicates an error during operation （catkin_make）
[CMake Error at CMakeLists.txt:5 (find_package):
By not providing "Findsmach_viewer.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"smach_viewer", but CMake did not find one.
Could not find a package configuration file provided by "smach_viewer" with
any of the following names:
smach_viewerConfig.cmake
smach_viewer-config.cmake
Add the installation prefix of "smach_viewer" to CMAKE_PREFIX_PATH or set
"smach_viewer_DIR" to a directory containing one of the above files. If
"smach_viewer" provides a separate development package or SDK, be sure it
has been installed.]
. 2 the file is not found.
rosrun pick_and_place_contraller state_machine.py

[leoll2]

Hi jz08, the project indeed depends on smach, make sure it is properly installed in your system.
By the way, I used ROS Melodic (Ubuntu 18.04) for this project, I cannot guarantee that it works with newer versions like Noetic too (but it should, with minor adjustments)