apache error log

[Sunita Barve]

Here is apache2 error log. Can we get clue to get it solved.

[Mon Nov 23 12:20:37.167066 2020] [:error] [pid 32626] [client 172.16.2.37:23803] script '/var/www/sp/subjects/Database.php' not found or unable to stat, referer: http://krclib.ncl.res.in/sp/subjects/index.php

[Mon Nov 23 12:20:42.349044 2020] [:error] [pid 32626] [client 172.16.2.37:23803] script '/var/www/sp/subjects/Chem Reposit.php' not found or unable to stat, referer: http://krclib.ncl.res.in/sp/subjects/index.php
[Mon Nov 23 12:27:50.101516 2020] [:error] [pid 32677] [client 183.60.108.82:39904] script '/var/www/elrekt.php' not found or unable to stat
[Mon Nov 23 12:27:50.805464 2020] [:error] [pid 32678] [client 183.60.108.82:46064] script '/var/www/index.php' not found or unable to stat
[Mon Nov 23 12:32:30.934153 2020] [:error] [pid 424] [client 172.16.2.37:56632] script '/var/www/sp/subjects/Database.php' not found or unable to stat, referer: http://krclib.ncl.res.in/sp/subjects/index.php
[Mon Nov 23 12:32:34.893183 2020] [:error] [pid 424] [client 172.16.2.37:56632] script '/var/www/sp/subjects/Chem Reposit.php' not found or unable to stat, referer: http://krclib.ncl.res.in/sp/subjects/index.php