user:/home/simulations/ros2_sims_ws/src/unicicle_robot/uniclicle_robot_pkg/urdf$ ls -la
drwxr-xr-x 2 user user 4096 Mar 18 13:58 .
drwxr-xr-x 8 user user 4096 Mar 18 13:58 …
-rw-r–r-- 1 user user 12790 Mar 18 13:58 unicicle.urdf
After changing the name, it works now.
I hope you can fix this in your simulation file of ROS2 TF UNIT3. It seems that I’m the only one who found the problem .