I am controlling a KUKA iiwa 14 robot using ROS2 Galactic and the nodes I found here: KUKA iiwa 14 Package
It worked fine but suddenly I can't open the robot with rviz anymore. I get the Error:
"Fixed Frame
No tf data. Actual error: Frame [world] does not exist"
and I don't see the robot in rviz anymore.
The solutions I could find are using ros1 and rosrun, which is not supported for ros2.
I would be very thankful for any advice.
