Leshan Jenkins build stuck ?

Since today, I faced an issue on : https://ci.eclipse.org/leshan/job/leshan/

Builds seem to be blocked on :

[INFO] --- frontend:1.12.1:yarn (yarn build) @ leshan-server-demo ---
[INFO] Running 'yarn build' in /home/jenkins/agent/workspace/leshan/leshan-server-demo/webapp
[INFO] yarn run v1.22.19
[INFO] $ vue-cli-service build
[INFO] All browser targets in the browserslist configuration have supported ES module.
[INFO] Therefore we don't build two separate bundles for differential loading.
[INFO] 
[INFO] 
[INFO] -  Building for production...

I tested it with :

• https://ci.eclipse.org/leshan/job/leshan/ (2 last build)
• https://ci.eclipse.org/leshan/job/leshan-nightly/ (1 last build)

And all seem to be blocked on this build step.

I tested the build locally and with github actions and it succeed.

I will try to do more test but if you have any idea about this, I take because for now I'm a bit lost.

Another point (not directly linked, so tell me if I should rather open a new issue about this) I also notice that my nightly builds are not trigger anymore (see https://ci.eclipse.org/leshan/), I'm using @midnight configuration. Do you also have any idea about this ?