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BugZero found this defect 1607 days ago.
When performing an infrastructure scan in Veeam Backup for AWS, you receive the following error: “Failed to synchronize region 'regionname': Value cannot be null. Parameter name: dnsName” "Value cannot be null. Parameter name: dnsName”
Your AWS account supports only EC2-Classic instances. In Veeam Backup for AWS, you can protect only EC2 instances that run in a VPC.
Please migrate from EC2-Classic to a VPC.