CyberPower RMCARD 303 and RMCARD 305 (205)

I am at a loss to figure out why both of my CyberPower UPS units say “Error Drawing Graph” for Voltage and Current. Both the graphs are solid red. I would also like to monitor the Enviromentals at some point but want to get the basics going.

[[email protected] ~]$ ./
Updating to latest codebase OK
Updating Composer packages OK
Updating SQL-Schema OK
Updating submodules OK
Cleaning up DB OK
Fetching notifications OK
Caching PeeringDB data OK
[[email protected] ~]$ ./validate.php

Component Version
LibreNMS 1.41-63-gac3fa28
DB Schema 256
PHP 7.0.30
MySQL 5.5.56-MariaDB
RRDTool 1.4.8


[OK] Composer Version: 1.6.5
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct