Updating WordPress plugins fails in WP Toolkit: Cannot find module

Symptoms

Updating plugins in WP Toolkit fails with the following error:

PLESK_ERROR: Unable to update plugin <plugin_name>, details: MIB search path: /path/to/.snmp/mibs:
/usr/share/snmp/mibs:
/usr/share/snmp/mibs/iana:
/usr/share/snmp/mibs/ietf:
/usr/share/mibs/site:
/usr/share/snmp/mibs:
/usr/share/mibs/iana:
/usr/share/mibs/ietf:
/usr/share/mibs/netsnmp
Cannot find module (SNMPv2-MIB): At line 1 in (none)
Cannot find module (IF-MIB): At line 1 in (none)
Cannot find module (IP-MIB): At line 1 in (none)
Cannot find module (TCP-MIB): At line 1 in (none)
Cannot find module (UDP-MIB): At line 1 in (none)
Cannot find module (HOST-RESOURCES-MIB): At line 1 in (none)
Cannot find module (NOTIFICATION-LOG-MIB): At line 1 in (none)
Cannot find module (DISMAN-EVENT-MIB): At line 1 in (none)
Cannot find module (DISMAN-SCHEDULE-MIB): At line 1 in (none)
Cannot find module (HOST-RESOURCES-TYPES): At line 1 in (none)
Cannot find module (MTA-MIB): At line 1 in (none)
Cannot find module (NETWORK-SERVICES-MIB): At line 1 in (none)
Cannot find module (SNMPv2-TC): At line 15 in /usr/share/snmp/mibs/UCD-DISKIO-MIB.txt
Cannot find module (SNMPv2-SMI): At line 34 in /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
Cannot find module (SNMPv2-TC): At line 37 in /usr/share/snmp/mibs/UCD-SNMP-MIB.txt

Cause

Updating the plugin fails because it requires a package which is not installed on the server. In this particular case, the package is snmp.

Resolution

Install the required package manually on Linux:

1. Connect to the server via SSH

2. Run the following command to install the snmp package:

CentOS/CloudLinux/RHEL:

# yum install snmp

Debian/Ubuntu:

# apt-get install snmp

If this does not help, contact the plugin developer for further assistance.