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ubuntu22.04roscore报错
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ubuntu22.04安装ros后，roscore后报错，Traceback (most recent call last):
File "/usr/bin/roscore", line 37, in <module>
from roslaunch.nodeprocess import DEFAULT_TIMEOUT_SIGINT, DEFAULT_TIMEOUT_SIGTERM
File "/usr/lib/python3/dist-packages/roslaunch/init.py", line 62, in <module>
from .scriptapi import ROSLaunch
File "/usr/lib/python3/dist-packages/roslaunch/scriptapi.py", line 42, in <module>
import roslaunch.parent
File "/usr/lib/python3/dist-packages/roslaunch/parent.py", line 54, in <module>
import roslaunch.server
File "/usr/lib/python3/dist-packages/roslaunch/server.py", line 80, in <module>
from rosgraph_msgs.msg import Log
ImportError: cannot import name 'Log' from 'rosgraph_msgs.msg' (/opt/ros/iron/lib/python3.10/site-packages/rosgraph_msgs/msg/init.py)