Juju bootstrap MAAS controller cannot verify CA of MAAS API

I’m new to juju and maas, I tried to bootstrap maas-controller with juju. For the MAAS I use a self-signed SSL-Cert that I added to the trust-store of the juju client.

When I use: juju bootstrap --constraints tags=juju mycloud maas-controller

I got this error: ERROR creating MAAS environ: Get "https://srvquok01.maas:5443/MAAS/api/2.0/version/": tls: failed to verify certificate: x509: certificate signed by unknown authority

Is this error from the juju controller? On the MAAS machines, I do not have the CA in the trust-store, and that is my question; what is the common practice in this scenario?

Can someone help me pls?

(btw, with a MAAS http endpoint, the bootstrap works fine)