Good day, everyone. My name is Emily Griffin, and I'm a technology consultant. What causes the 'Quicken error ol-393-a' in Quicken bill pay, according to several Quicken users? The following are the causes of the ol-393-a error. Quicken was installed incorrectly due to a defective file download. As a consequence of a recent update of quicken-related software, the windows registry has been damaged. As a consequence of a virus or malware attack, the Quicken system files and other Quicken-related apps were damaged. Quicken-related files were accidentally or intentionally erased by another software.