A user in ESS can receive this error for the following reasons:
They have entered the Verification code incorrectly.
Copy the code from the email and paste it into the Verification Code.
The Verification Code is valid for seven minutes, after which time it will expire, and you will need a new code.
Request a new code by clicking on Send new code. The email could be delayed due to the receiving email server blocking or quarantining the email as spam, and it may not reach you in time. If this is the case and you are using a work email address, reach out to your IT.