Re-registering server

We have changed the IP of our server, and now VNC no longer works.

I've deleted it from the RealVNC website, but when I try to rejoin I get :

# vncserver-x11 -service -joinCloud <TOKEN>

A networking error has occurred. Details:

Hosted Bootstrap error: Network failure: Error connecting: X.509 Error:
Self-signed certificate not trusted

How to fix this ?

Using realvnc-vnc-server

A networking error has occurred. Details:

Hosted Bootstrap error: Network failure: Error connecting: X.509 Error:
Self-signed certificate not trusted

Using realvnc-vnc-server version 6.9.0.46599 on Ubuntu 22.04.