The correct answer is 'Review the database connection string in the template' because a common misconfiguration in templates is the incorrect specification of resource identifiers or connection strings. Ensuring the connection string is accurate is essential for the application to communicate with the database. Checking the CPU and memory allocation might be relevant if performance issues manifest post-deployment. The script execution policy is less likely to be the cause if the IaC template has deployed without errors, and security configurations are deemed correct. Updating the orchestration tool's version, while sometimes necessary, does not directly affect the database connection settings within a template.