[Humble, simple-api-server] Websockets 9.1 from ubuntu offical ppa doesn't seem to work

Bug report

When launching office world, the simple API server is not able to update the task states from the websocket server, resulting in the js-panel not able to display the tasks states. (the https://github.com/open-rmf/rmf_demos/issues/166#issuecomment-1278820549 by Grey prompt us to investigate the version difference, although the fastapi is not giving us any issue at this point)

We switched to using the latest version (10.4), through building from source. It seems to work.

It seems that the default Ubuntu PPA’s python3-websockets version 9.1-1 is somehow buggy.

[ncnynl]

I have fixed the issue.

follow steps:

sudo apt remove python3-websockets 
python3 -m pip install websockets==10.4
python3 -m pip install asyncio 

and recompile repo .

cd ~/rmf_ws
source /opt/ros/humble/setup.bash
export CXX=clang++
export CC=clang
colcon build --mixin release lld

it work now.

[ncnynl]

i have the issue too .

I have installed the humble version of rmf to ubuntu22.04

I follow the desc purge websockets 9.1 and Install websockets to 10.4 , but still not show task status on rmf_pane_js website

I startup office.launch.xml , it will show the content:

[simple_api_server-14] The WebSocket transport is not available, you must install a WebSocket server that is compatible with your async mode to enable it. See the documentation for details. (further occurrences of this error will be logged with level INFO)