Could not create server TCP listening socket 127.0.0.1:11000: bind: Address already in use

no brother this is my first installation I don’t get access. After I finish the final step (sudo supervisorctl restart all) [Guide] How to install ERPNext v14 on Linux Ubuntu (step-by-step instructions)
Then I want to find my IP address so put the command bench start Unfortunately above errors coming.
thanks for your reply