Question About Logs and Initiating User

You cannot identify the cause of the logs by user. However, this error shouldnt break only for a particular user. Based on your screenshot, it appears that you have a report filter that is incorrectly configured.
As an alternative, you can go to System > System Tools > Event Viewer and select the Report Activity" tab (this may be hidden under "More" on the top right corner of the screen if you dont see this right away). You can edit this report to include User ID as a column. This report should help you determine who has accessed a particular report recently."