Таже самая проблема что в посте выше, в error log веб сервера вижу еще такое:
[Wed Sep 02 15:14:29.454685 2020] [php7:notice] [pid 90091] [client 192.168.83.16:52376] PHP Notice: Undefined variable: iface in /var/www/html/function_lib.php on line 109, referer: http://192.168.83.13/index.php?page=olt&olt=10.10.254.45
[Wed Sep 02 15:14:29.454973 2020] [php7:warn] [pid 90091] [client 192.168.83.16:52376] PHP Warning: snmp2_get(): Invalid object identifier: .1.3.6.1.4.1.3320.101.10.5.1.5. in /var/www/html/function_lib.php on line 132, referer: http://192.168.83.13/index.php?page=olt&olt=10.10.254.45
[Wed Sep 02 15:14:29.455159 2020] [php7:warn] [pid 90091] [client 192.168.83.16:52376] PHP Warning: snmp2_get(): Invalid object identifier: 1.3.6.1.2.1.2.2.1.2. in /var/www/html/function_lib.php on line 160, referer: http://192.168.83.13/index.php?page=olt&olt=10.10.254.45
[Wed Sep 02 15:14:29.455323 2020] [php7:warn] [pid 90091] [client 192.168.83.16:52376] PHP Warning: snmp2_get(): Invalid object identifier: .1.3.6.1.4.1.3320.101.10.1.1.27. in /var/www/html/function_lib.php on line 118, referer: http://192.168.83.13/index.php?page=olt&olt=10.10.254.45