I've encountered this weird issue with Dokuwiki on a Stick.
When I close a session on my PC, I am shown this error message, where as the session is closing I am told that a process named mapache.exe cannot be found. The weird part as that when I am using the same Dokuwiki setup on my laptop (same flashdrive and everything), it closes cleanly without any issues.
As far as I can tell, the presence of this error isn't actually causing any issues, but I wanted to still see if anyone had encountered this or if I could fix it. Mapache.exe is indeed present within the Dokuwiki on a Stick installation on my flashdrive, and again this error message is only displayed on my PC, not my Laptop (both running Windows 10).