I scp my workspace to KR260. Then, I sourced the correct file and ran krs_ws/local_setup.bash. So far no issues and no error messages. Then, when I used ros2 run doublevadd_publisher doublevadd_publisher, I got the following message,

In the previous built period, I selected kv260 firmware and used --mixin kr260. It is weird that I can run vadd_publisher at 10Hz successfully.
Can anyone give me some advice?