Woodpecker - can't connect to gitea

What app is this about, and its version: Woodpecker, v3.12.0~ynh1
What YunoHost version are you running: 12.1.38
What type of hardware are you using: Virtual machine

Describe your issue

I’m trying to install Woodpecker on my yunohost. I already have a Gitea instance working.
I wanted to connect Woodpecker to my Gitea.

I generated ID and secrets from my Gitea (https://git.[domain]/gitea), setting the URI to the Woodpecker address (https:ci.[domain]/woodpecker/authorize).
After installation, I go to the Woodpecker app, landing on the “login” page, with only a button to log into the gitea instance. After a click, I land on the gitea instance to authorize the app, I then authorize the app, and got redirected to the Woodpecker “login” page with an error “The inscriptions are closed” (error=registration_closed in the url of woodpecker)

Share relevant logs or error messages

Nothing in log.