If the user is authorized to take the action, and the error in question isn't related to authorization or authentication, then the error message should be clear

If the user is authorized to take the action, and the error in question isn't related to authorization or authentication, then the error message should be clear and actionable. The action may be "contact support" with a trace ID, but it should still be clear. When it's something the user can fix, and the application already knows the user is permitted to do what they're trying to do, the application should provide as much information as it can to help them complete the task.