kubeflow for microk8s deployment fail

Trying to deploy Kubeflow for microk8s and following the readme file I had this issue:

Executing changes:

upload charm cs:~kubeflow-charmers/ambassador-78 for series kubernetes ERROR cannot deploy bundle: cannot add charm "cs:~kubeflow-charmers/ambassador-78": cannot retrieve charm "cs:~kubeflow-charmers/ambassador-78": cannot get archive: Get https://api.jujucharms.com/charmstore/v5/~kubeflow-charmers/ambassador-78/archive?channel=stable: x509: certificate is valid for h2864380.stratoserver.net, not api.jujucharms.com Command '('juju', 'deploy', '-m', 'kubeflow', 'kubeflow', '--channel', 'stable', '--overlay=/tmp/tmpss1zciuq')' returned non-zero exit status 1.

canonical / bundle-kubeflow