While installation of Velero on kubernetes using helm charts as below

helm install --namespace velero \
--set configuration.provider="Microsoft Azure" \
--set-file credentials.secretContents.cloud=<FULL PATH TO FILE> \
--set configuration.backupStorageLocation.name=azure \
--set configuration.backupStorageLocation.bucket=<BUCKET NAME> \
--set configuration.volumeSnapshotLocation.name=<PROVIDER NAME> \
--set configuration.volumeSnapshotLocation.config.region=<REGION> \
--set image.repository=velero/velero \
--set image.tag=v1.2.0 \
--set image.pullPolicy=IfNotPresent \
--set initContainers[0].name=velero-plugin-for-microsoft-azure:v1.0.0 \
--set initContainers[0].image=velero/velero-plugin-for-microsoft-azure:v1.0.0 \
--set initContainers[0].volumeMounts[0].mountPath=/target \
--set initContainers[0].volumeMounts[0].name=plugins \
stable/velero

I have configured the below environment variables in credential-velero file and path has been provided in above command.

credentials-velero file -

AZURE_SUBSCRIPTION_ID=${AZURE_SUBSCRIPTION_ID}
AZURE_TENANT_ID=${AZURE_TENANT_ID}
AZURE_CLIENT_ID=${AZURE_CLIENT_ID}
AZURE_CLIENT_SECRET=${AZURE_CLIENT_SECRET}
AZURE_RESOURCE_GROUP=${AZURE_RESOURCE_GROUP}
AZURE_CLOUD_NAME=AzurePublicCloud

I am getting below error -

an error occurred: some backup storage locations are invalid: error getting backup store for location "default": rpc error: code = Unknown desc = unable to get all required environment variables: the following keys do not have values: AZURE_TENANT_ID, AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, AZURE_SUBSCRIPTION_ID

Could you please help with resolution of above error?