nil pointer evaluating interface {}.name when deploy helm chart - kubernetes-helm

Question

I am new to helm and kubernetes, so I maybe missed something.
I have created a Helm Chart to deploy MISP. Unfortunately, I am now getting the following error.
Error: INSTALLATION FAILED: template: misp/templates/serviceaccount.yaml:4:11: executing "misp/templates/serviceaccount.yaml" at <include "misp.fullname" .>: error calling include: template: misp/templates/_helpers.tpl:7:40: executing "misp.fullname" at <.Values.misp.name>: nil pointer evaluating interface {}.name
My helpers.tpl looks like this:
{{/*
This is a helper template file that defines the misp.name variable.
*/}}
{{- define "misp.fullname" -}}
{{- printf "%s-%s" .Release.Name .Values.misp.name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- define "misp.name" -}}
misp
{{- end -}}
{{- define "misp-chart.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
{{- end }}
{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
If release name contains chart name it will be used as a full name.
*/}}
{{- define "misp-chart.fullname" -}}
{{- if .Values.fullnameOverride }}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
{{- else }}
{{- $name := default .Chart.Name .Values.nameOverride }}
{{- if contains $name .Release.Name }}
{{- .Release.Name | trunc 63 | trimSuffix "-" }}
{{- else }}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
{{- end }}
{{- end }}
{{- end }}
{{/*
Create chart name and version as used by the chart label.
*/}}
{{- define "misp-chart.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
{{- end }}
{{/*
Common labels
*/}}
{{- define "misp-chart.labels" -}}
helm.sh/chart: {{ include "misp-chart.chart" . }}
{{ include "misp-chart.selectorLabels" . }}
{{- if .Chart.AppVersion }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
{{- end }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
{{- end }}
{{/*
Selector labels
*/}}
{{- define "misp-chart.selectorLabels" -}}
app.kubernetes.io/name: {{ include "misp-chart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- end }}
{{/*
Create the name of the service account to use
*/}}
{{- define "misp-chart.serviceAccountName" -}}
{{- if .Values.serviceAccount.create }}
{{- default (include "misp-chart.fullname" .) .Values.serviceAccount.name }}
{{- else }}
{{- default "default" .Values.serviceAccount.name }}
{{- end }}
{{- end }}
and my templates/serviceaccount.yaml like this:
apiVersion: v1
kind: ServiceAccount
metadata:
name: {{ include "misp.fullname" . }}
labels:
app: {{ include "misp.name" . }}
chart: {{ include "misp.chart" . }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
And here my values.yaml
# Default values for misp.
# This is a YAML-formatted file.
# Declare variables to be passed into your templates.
replicaCount: 1
image:
repository: coolacid/misp
tag: latest
pullPolicy: IfNotPresent
service:
type: ClusterIP
port: 8080
ingress:
enabled: false
# Used to create an Ingress record.
hosts:
- misp.example.com
annotations:
# kubernetes.io/ingress.class: nginx
# kubernetes.io/tls-acme: "true"
tls:
# Secrets must be manually created in the namespace.
- secretName: misp-tls
hosts:
- misp.example.com
database:
mariadb:
enabled: true
image:
repository: bitnami/mariadb
tag: 10.3.23-debian-10-r44
pullPolicy: IfNotPresent
rootUser:
password: password
# databaseName: misp
# user: misp
# password: misp
redis:
enabled: true
image:
repository: bitnami/redis
tag: 6.0.6-debian-10-r0
pullPolicy: IfNotPresent
resources:
limits:
cpu: 100m
memory: 128Mi
requests:
cpu: 100m
memory: 128Mi
Thank you for your help
try to regenerate the files