Kubeapps fails to sync AppRepositories on Kubernetes 1.20

Kubeapps fails to sync AppRepositories on Kubernetes 1.20: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I tried installing the latest Kubeapps on a Kubernetes 1.20 cluster (still a supported upstream version) and the apprepository-controller can't get the…