InvalidArgument Error on /validate/email

[vqndev]

Hello. I am using your postman collection. I was able to use validation/email to get my code, but when I try to validate it, i get those error response. Can you please help?

{ "code": "InvalidArgument", "message": "Verification code for aep:email:joe@blah.com not found" }

My request was:

{ "code":"755211", "email":"joe@blah.com" }