Error when testing rules under Transaction Console, what could be the possible cause of this error

Summary:

In my custom role when clicking Test Rule in Transaction Console it display this error message : An application error occurred. See the incident log for more information.An application error has occurred. Your help desk can use the following information to obtain a more detailed description of this incident: 19, Server Domain: FADomain, Server Instance: UIServer_1, Application Name: ORA_HCM_UIAPP

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