📜  RLException：无效<param>标签：无法加载命令参数[robot_description]：没有这样的命令[[&#39;opt ros noetic share xacro xacro.py&#39;,&#39;home megara_1 catkin_ws src robot_description urdf robot.xacro&#39;]]. - 无论代码示例

In your launch file just change the param value as