I have a exception and ı can't solve to this problem. Please help me.

burki1903@burki1903:~$ roslaunch mybotgazebo mybotworld.launch

RLException: Invalid tag: Cannot load command parameter [robotdescription]: no such command [['/opt/ros/noetic/share/xacro/xacro.py', '/home/burki1903/mybotws/src/mybot_description/urdf/mybot.xacro']].

Param xml is The traceback for the exception was written to the log file