Cannot install RabbitMQ: Error in dnf package

I have an issue when trying to install RabbitMQ for my OpenStack infrastructure: I tried to run dnf -y install centos-release-openstack-xena. Everything seems to be OK but when i try to enable my repo and starting an update : dnf -vv --enablerepo=centos-openstack-xena -y upgrade I have this error: CentOS-8 - RabbitMQ 38 171 B/s | 38 B 00:00 Error: Failed to download metadata for repository « centos-rabbitmq-38 » : Cannot prepare internal mirrorlist: No URLs in mirrorlist Here is my file /etc/yum.repos.d/CentOS-Messaging-rabbitmq.repo

[centos-rabbitmq-38]
name=CentOS-8 - RabbitMQ 38
#baseurl=http://mirror.centos.org/centos/$releasever/messaging/$basearch/rabbitmq-38 
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=messaging-rabbitmq-38 
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Messaging

I tried with the lastest version of CentOS 8 Stream. If someone could help me it will be great. Thank you