AWS EC2实例启动错误消息

Question

我很难与特定用户一起启动EC2实例。解码的错误消息（来自aws sts decode-authorization-message）是：

DecodedMessage|{  
   "allowed":false,
   "explicitDeny":false,
   "matchedStatements":{  
      "items":[  

      ]
   },
   "failures":{  
      "items":[  

      ]
   },
   "context":{  
      "principal":{  
         "id":"AIDAJJEIJ6GU4IX5WT5DA",
         "name":"aws_portal",
         "arn":"arn:aws:iam::846575128002:user/aws_portal"
      },
      "action":"ec2:RunInstances",
      "resource":"arn:aws:ec2:eu-west-1::image/ami-8282a2f1",
      "conditions":{  
         "items":[  
            {  
               "key":"ec2:ImageType",
               "values":{  
                  "items":[  
                     {  
                        "value":"machine"
                     }
                  ]
               }
            },
            {  
               "key":"ec2:Owner",
               "values":{  
                  "items":[  
                     {  
                        "value":"846575128002"
                     }
                  ]
               }
            },
            {  
               "key":"ec2:Public",
               "values":{  
                  "items":[  
                     {  
                        "value":"false"
                     }
                  ]
               }
            },
            {  
               "key":"ec2:Region",
               "values":{  
                  "items":[  
                     {  
                        "value":"eu-west-1"
                     }
                  ]
               }
            },
            {  
               "key":"ec2:RootDeviceType",
               "values":{  
                  "items":[  
                     {  
                        "value":"ebs"
                     }
                  ]
               }
            }
         ]
      }

有谁知道问题是什么 - 说实话这条消息对我没有帮助 - 我不明白