Ansible Playbook Troubleshooting for Azure

I need help troubleshooting an Ansible playbook that backs up an Azure Key Vault. I'm encountering execution errors, and I'm uncertain if the issue is with connecting to Azure or due to incorrect values in the playbook. Someone who has done this before should take less than an hour

Key Requirements:
- Troubleshoot execution errors
- Validate connection to Azure
- Check for incorrect values in the playbook
- Ensure proper backup of Azure Key Vault

Ideal Skills and Experience:
- Strong experience with Ansible
- Familiarity with Azure and Azure Key Vault
- Problem-solving skills to diagnose and fix playbook issues
- Ability to verify and validate credentials and configurations

Please provide a brief overview of your experience and approach to this task.

WARNING]: provided hosts list is empty, only localhost is available. Note that
the implicit localhost does not match 'all'
PLAY [Backup Azure Key Vault Secrets] ******************************************
TASK [backup_keyvault : Fetch metadata of secrets in the Key Vault] ************
ok: [localhost]
TASK [backup_keyvault : Combine secrets into dictionary] ***********************
skipping: [localhost]
TASK [backup_keyvault : Fetch actual secret values] ****************************
fatal: [localhost]: FAILED! => {"msg": "'secret_names' is undefined"}
PLAY RECAP *********************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=1 skipped=1 rescued=0 ignored=0