Getting ERROR: supervisorctl restart frappe-bench-web:

Run below commands :

bench setup socketio
bench setup supervisor
bench setup redis
sudo supervisorctl reload


Would like to add:
If the error comes along with notification

INFO: A newer version of bench is available

Then you may choose to run below command to update the frappe bench then retry to run above commands. Worked in my case.

pip3 install --upgrade frappe-bench