Rancher web don't see Longhorn install

System : 3 Bar Metal servers with a RKE cluster
1 Bar Metal server with the Rancher/Rancher server installed.

Because I cannot install longhorn via the web catalog system, (see: 10856)
I installed longhorn with kubectl on the rke-cluster.
Installation is oke and longhorn is working fine.

If you install the Rancher/Rancher server before installing Longhorn, than you can’t see Longhorn in the website.
Installing Rancher/Rancher after installing Longhorn no problem.

Can I start a kind of refresh on the Rancher website to check for the newly installed services like Longhorn?