How to fix Helm template error in Kubernetes

helm template my-release ./my-chart -f values.yaml
helm template my-release ./my-chart --debug

helm lint ./my-chart

helm template my-release ./my-chart -f values.yaml --debug | head -50

# Or validate YAML
yaml-lint values.yaml

grep -r "\.Values\." ./my-chart/templates/
helm template my-release ./my-chart --debug 2>&1 | grep -i undefined

{{- if .Values.something }}
key: value
{{- end }}

helm template my-release ./my-chart

helm dependency update ./my-chart
helm dependency list ./my-chart

# Variable reference
image: {{ .Values.image.repository }}:{{ .Values.image.tag }}

# Conditional
{{- if .Values.enabled }}
feature: enabled
{{- end }}

# Loops
{{- range .Values.items }}
  - name: {{ .name }}
{{- end }}

# Default values
replicas: {{ .Values.replicaCount | default 1 }}