EC2 Permission Denial Chain Diagnostic Troubleshooter (Part 2)

Use the interactive troubleshooter below to identify your EC2 permission denial symptom, review the raw evidence, understand the root cause, and apply the recommended fix.

🚨 Step 1: What specific error symptom are you experiencing?

Please click the most accurate description:

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Quick Reference Table

#	Scenario	Key Error Signal	Root Cause	The Fix
4	Missing Cascade Termination Permissions	<Error><Code>UnauthorizedOperation</Code><Message>You are not authorized to perform this operation. Encoded authorization failure message: VvuncIxj7Z...	The IAM identity deleting a fleet configured to terminate its instances lacks the explicit ec2:TerminateInstances permission.	Add "Action": [ "ec2:DeleteFleets", "ec2:TerminateInstances" ] to the IAM policy evaluating the request.
5	Spot Request Unauthenticated Tag Denial	"Sid": "RequestSpotInstancesOnlyIfTagIs_environment=production - NOT SUPPORTED - DO NOT USE!" ... "Specifying another tag... results in an Unauthenticated error, because if a user tags a Spot Instance request, Amazon EC2 evaluates the spot-instances-request resource in the RunInstances statement."	Applying tags triggers evaluation of the spot-instances-request resource, failing the action if unsupported aws:RequestTag conditions are attached to the RunInstances policy.	Explicitly include the spot-instances-request resource in the RunInstances allow statement without strict tag conditions, and enforce tags via the ec2:CreateTags action.
6	Cross-Resource Condition Key Blindspot	"If you write a policy with a condition key... the policy may prevent users from performing the action at all, because the condition check fails for the resources to which the condition key does not apply."	The condition key check fails on the resources in the request that do not naturally support that specific key.	Append ...IfExists to the condition type (e.g., StringLikeIfExists) so the condition key is ignored for resources that do not use it.