CREATE_FAILED error in CloudFormation stack
If you encounter a CREATE_FAILED error when you launch the Quick Start, it is recommended that you relaunch the template with Rollback on failure set to No. (This setting is under Advanced in the AWS CloudFormation console Options page.) With this setting, the stack’s state is retained and the instance is left running, so you can troubleshoot the issue.
When you set Rollback on failure to No, you continue to incur AWS charges for this stack. Ensure to delete the stack when you finish troubleshooting.
FortiGate-VM master election was not successful
If the FortiGate-VM master election is not successful, reset the master election. If the reset does not solve the problem, please contact support.
How to reset the master election
To reset the master election, refer to the section Verify the master election to locate the master record and delete the record. A new master FortiGate-VM will be elected and a new record will be created in the table as the result.