this issue might be caused by a corrupted or incorrect map.
In order to fix this issue, you can remove map files from /route_admin_panel/nodejs/user_maps.
First enter directory where maps used by route_admin_panel are stored:
If you don’t have any important maps nor target points saved on your robot I would suggest removing all files including config.json. This will ensure that all files that might cause your problem will be removed. You can do it by running:
# make sure you are in /route_admin_panel/nodejs/user_maps directory
rm *.pgm *.yaml *.json
After you remve files from this directory run
roslaunch route_admin_panel demo_rosbot_mbed_fw.launch
Everything should work from now on.