[task_generator_node-6] process has died

[IcenDy]

This project is interesting. When I launch "arena_bringup start_arena_flatland.launch" firstly, there are some issues:

1. The bash shows "[task_generator_node-6] process has died" but the robot can navigation correctly. How to address this?
2. Also, bash shows "Failed to load model! Exception: Flatland YAML: Model with name "burger" already exists". Seems like I don't need to care about it?
3. I try to replace teb of local_planner with arena in "arena_bringup start_arena_flatland.launch". The robot can move to the goal but cannot stop here instead toss. Is this due to me not training the network?