To troubleshoot issues with ChangeAuditor, the log files are stored in "NPTLOG" trace log file type. These files can be opened by the viewer installed as part of the ChangeAuditor Client.
Open the log file for the relevant component of ChangeAuditor to investigate issues you experience.
Take note that if your Windows server has folder options to hide file extensions, the ".nptlog" will not show, however this will show as file type "Trace log"
The default log file locations for Change Auditor are as follows:
Change Auditor Coordinator
Change Auditor Agent
Change Auditor Client
Change Auditor Web Client