Account Linking - Resolve a Client ID mismatch
What to do when you see a Client ID mismatch error as you’re linking your AWS accounts to Stax
While trying to link your AWS account to Stax, you might receive a Stax client ID mismatch error.
This happens if you change the Stax Client ID you entered into the Stax-provided External ID space on the AWS Create Stack page.
To fix it, go to the Stax account linking process and click the Open AWS Console button again.
This will open the AWS console Create Stack page with the CloudFormation template attached again. This time, make sure you leave the external ID exactly as it appears when the page loads.