Health status not displayed properly on Hitachi boxes

Hello!

Reinstalled stor2rrd 7.21-14 on a fresh RHEL 7.8 server, got everything working fine, but recently discovered a weird issue with health status on Hitachi VSP storage. Health status always says "Optimal", but component list is empty. Something seems to be wrong with SNMP configuration but I can't find out what exactly.

config_check.sh displays the following:

MIB search path: /home/stor2rrd/.snmp/mibs:/usr/share/snmp/mibs

Cannot find module (VSPGx00MIB): At line 1 in (none)

I've put the VSPGx00MIB.txt in both locations but it didn't make any difference.

/home/stor2rrd/stor2rrd/logs/error.log-[storage] shows this for every component:

Got -58 querying [ip] for dkcHWProcessor (1.3.6.1.4.1.116.5.11.4.1.1.6.1.2). /home/stor2rrd/stor2rrd/bin/vspgperf.pl:6079

Tried to replicate the error by running snmpwalk separately and it it doesn't show any problem:

snmpwalk -v 3 -u xormonsnmp -l authPriv -A [key] -X [key] -a SHA -x AES [ip] 1.3.6.1.4.1.116.5.11.4.1.1.6.1.2

SNMPv2-SMI::enterprises.116.*.6.1.2.[serial] = INTEGER: 1