Well, Quicken bill pay error OL-393-a displays when you try to download the transactions, sending payments online or during online account setup. You can follow a few troubleshooting tips to get rid of error OL-393-a, but you should make sure to validate the account information. To proceed, you need to click “Tools” in Quicken software and then verify the account credentials and click “Verify”. Now search for the hidden account and click on each account in the account list option. Now uncheck the box for hidden accounts. This way, you can troubleshoot Quicken error code OL-393-a.