Commented Unassigned: TempWorkingPath is being overwritten [1807]

I tried to change the value of the TempWorkingPath parameter, but every time I do so it gets overwritten when the application starts again.
What am I doing wrong?
Comments: ** Comment from web user: Plantje **

Sorry, the log file is attached now.

I just upgraded to 2.3.15 and I still have the issue.

Yes, I am changing the parameter manually by editing the config file