docker - Unable to creating admin user, ejabberd through docker

Question

By following the documentation, when trying to run the command

PS C:\Users\user_name> docker exec -it ejabberd bin/ejabberdapi register --endpoint=http://127.0.0.1:5280/ --jid=admin@localhost --password=passw0rd

to create an admin user, it shows the following error

ejabberdapi: error: user registration error for admin@localhost: Error 99: invalid character '<' looking for beginning of value