Cannot install MQTT broker

Hello,
I am new to home-assistant, thanks all developpers and the community!

I cannot install MQTT mosquitto add-on, I have the following errors:

ERROR (SyncWorker_0) [supervisor.docker.interface] Can't install homeassistant/aarch64-addon-mosquitto:5.1 -> 500 Server Error for http+docker://localhost/v1.40/images/create?tag=5.1&fromImage=homeassistant%2Faarch64-addon-mosquitto: Internal Server Error ("Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)").

then

“500 Server Error for http+docker://localhost/v1.40/images/create?tag=5.1&fromImage=homeassistant%2Faarch64-addon-mosquitto: Internal Server Error (“Get “https://registry-1.docker.io/v2/”: context deadline exceeded”)”

Core version: core-2021.2.3
Supervisor: supervisor-2021.02.11
Host: Home assistant Operating System 5.12 (not docker)

Thanks