I am getting an error "Token key not found"

[Anonymous]

I am getting an error "Token key not found" while trying to approve an email. Can someone guide me what does this mean and how to solve this?

I have attached the screenshot.

[Dory_Viscoglio]

You likely have an incorrectly formatted token in your email. Can you include the HTML of the email for review?

[Kenny_Elkington]

Try downloading the HTML of the Email and doing a full text search for "{{", that should show you all of the tokens it's attempting to parse and see which one is incorrect.  Failing that, check in the text version as well.