Cloud Managerでメディエーターが「Failed」または「Degraded」と表示されています。クレデンシャルを検証できません

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Category:: cloud-manager

Specialty:: cloud<a>2009283054</a>

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環境

Cloud Manager
Cloud Volumes ONTAP（CVO）
メディエーター
AWS

問題

では、Cloud ManagerにHAステータスがデグレードと表示されます reason: Unknown mediator error.
メディエーターは稼働中です。
Cloud Manager Serverログレポート AWS was not able to validate the provided access credentials

2022-08-26 22:30:19,565 UTC WARN  [Update all CVOs statuses    ] [MXRT5Qud] [        ] [System      ] (oncloud-akka.actor.default-dispatcher-225) [AwsHaClusterStatusCalculator:79] Calculated DEGRADED status with reason: Unknown mediator error
 2022-08-26 22:30:19,620 UTC INFO  [Update all CVOs statuses    ] [MXRT5Qud] [        ] [System      ] (oncloud-akka.actor.default-dispatcher-231) [AwsHaClusterStatusCalculator:67] Mediator reported an error status: status code: 4, status message: AWS error Unable to validate credentials returned for describe vpcs from aws:
 An error occurred (AuthFailure) when calling the DescribeVpcs operation: AWS was not able to validate the provided access credentials