roscore not working but it worked before
i am a beginner lerning ros and haven't touched ros for some time. wanted to try some stuff today. when i roscore, i got this error:
Traceback (most recent call last): File "/usr/bin/roscore", line 72, in <module> import roslaunch 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 79, in <module> from rosgraph_msgs.msg import Log ImportError: cannot import name 'Log' from 'rosgraph_msgs.msg' (/opt/ros/foxy/lib/python3.8/site-packages/rosgraph_msgs/msg/__init__.py)
i checked to see but i have no Log.msg file. i resintalled the rosgrpah message and also reinstalled my ros. everyhting is updated and upgarded. i am using foxy in ubuntu 20.04.
any help will be greatly appreciated.
