Hi Frank,
Thanks for your input. please find below content of error_log file on ocs server side. however in agent log file no suspicious events occured.
[Tue Sep 01 14:31:07.301252 2020] [php7:warn] [pid 24021] [client 10.64.96.32:60669] PHP Warning: array_key_exists() expects parameter 2 to be array, null given in /usr/share/ocsinventory-reports/ocsreports/require/function_ipdiscover.php on line 262, referer: http://172.27.73.129/ocsreports/index.php?function=show_ipdiscover
[Tue Sep 01 14:31:07.301257 2020] [php7:warn] [pid 24021] [client 10.64.96.32:60669] PHP Warning: array_key_exists() expects parameter 2 to be array, null given in /usr/share/ocsinventory-reports/ocsreports/require/function_ipdiscover.php on line 262, referer: http://172.27.73.129/ocsreports/index.php?function=show_ipdiscover
[Tue Sep 01 14:31:07.301262 2020] [php7:warn] [pid 24021] [client 10.64.96.32:60669] PHP Warning: array_key_exists() expects parameter 2 to be array, null given in /usr/share/ocsinventory-reports/ocsreports/require/function_ipdiscover.php on line 262, referer: http://172.27.73.129/ocsreports/index.php?function=show_ipdiscover