It's probably a problem with .htaccess (worked and after uncommenting it does not work).
I do not see anything obviously wrong.
If I make a deliberate error in the path to .htpasswd I get an "Internal Server Error".
The path to .htaccess must probably be an absolute path.
Any chance of a typo?
If you try to connect to cops with
http://192.168.x.x:8162/cops111/ what happens?