The Journal Writing process encountered error message.
Reference Key -4 pertains to -System-. When the system creates Journal Depreciation Posting Reference, you will notice in the System Notes that it was created by -System-.
The error is caused by a Workflow or Scripts that has custom field that would like to show Journal creators. If they are sourcing it from the Employee list, it will get this message. -System- is not included in the Employee list.
It should be located if it is from a workflow or script. In order to proceed to journal creation, the custom field should be removed or inactivated from the custom journal entry.
One of the method to handle the solution is that we can exclude the script context from the particular field action which is used in the workflow.