Caretta starting Error watching cluster's state: <nil>

[prometheus-tao]

Describe the bug
Caretta pod don't to runing, please see follow error prompt.
2023/06/12 03:10:59 Caretta starting...
2023/06/12 03:10:59 Error watching cluster's state:
To Reproduce
Steps to reproduce the behavior:

1. download release version for chart link https://github.com/groundcover-com/caretta/archive/refs/tags/v0.0.16.zip
2. helm install caretta . --namespace caretta

Expected behavior
All pod can be to normal running status
Screenshots

Environment (please complete the following information):

• OS: Centos7.9 5.4.210-1.el7.elrepo.x86_64
• Browser chrome
• Kubernetes cluster information - distribution, version: v1.18.20
• Caretta version: v0.0.16

Additional context