Velero BackupStorageLocation showing unavailable

[techgeeks030715]

I encountered an error while attempting to deploy Velero on my Kubernetes cluster, which was set up using Kubeadm commands and is hosted on Azure Virtual Machines with one master and one worker node.

Below is the command I used for Velero installation:
velero install
--provider azure
--plugins velero/velero-plugin-for-microsoft-azure:v1.1.0
--bucket velero
--secret-file ./credentials-velero
--backup-location-config resourceGroup="test1",storageAccount=teststoragevelero,storageAccountKeyEnvVar="Here I have provided the access key",subscriptionId="subscription-id of my Azure account"

However, I encountered the following error:
unavailable: rpc error: code = Unknown desc = no storage account key found in env var " controller=backup-storage-location logSource="pkg/controller/backup_storage_location_controller.go:178"

I have double-checked the access key, and it appears to be correct.

Would appreciate any insights or assistance on resolving this issue. Thank you.