The Payflex website has recently instituted a new type of authentication which we are unable to support at this time.
If you would like to track this account, you can add it as a manual account so it will be tracked with your other online accounts and you will be able to see it in your Net Worth calculations. Note that you won't be able to track the transactions at this time but can see the value of the account.
For instructions on how to add offline accounts please see the following support article: Create a Manual Account.
We do suggest marking the previously linked account as closed on your dashboard to preserve its history by following the steps in this article: How Do I Mark an Account as Closed in Empower Personal Dashboard?