Branch planner fails due to insufficient privileges to create GitRepository object

[mrybson]

Hello
I just created fresh installation of Flux + Tofu controller with Branch Planner enabled. I follow the guide: https://flux-iac.github.io/tofu-controller/branch-planner/branch-planner-getting-started/

Once I open PR, that's what I get in the planner controller logs:

{"level":"error","ts":"2025-01-31T10:11:14.172Z","logger":"polling-server","msg":"failed to reconcile Terraform object for PR","version":"","sha":"","terraform":"product-a-tf-config","namespace":"flux-system","source":"product-a-git-repo","PR ID":"2",
"error":"unable to reconcile Source for Terraform object product-a-tf-config-pr-2 in the namespace flux-system: reconcile failed for Source product-a-git-repo-274fa63f241dc5005619-pr-2 in the namespace flux-system: gitrepositories.source.toolkit.fluxcd.io is forbidden: User "system:serviceaccount:flux-system:tf-controller" cannot create resource "gitrepositories" in API group "source.toolkit.fluxcd.io" in the namespace "flux-system""}

Is there anything I am missing in my configuration?