Javascript error when trying to view historical CPU, RAM usage reports

On the VirtualMin dashboard, I receive an error when I click on the chart icon to view historical data.

Details: [Exception... "An invalid or illegal string was specified" code: "12" nsresult: "0x8053000c (NS_ERROR_DOM_SYNTAX_ERR)" location: "[SERVERNAME]/virtual-server/timeplot/api/1.0/scripts/plot.js Line: 249"]



Does this still happen even if you wait a few minutes for Virtualmin to do its first statistics collection run?

Did your system's clock ever go back in time at some stage? That can confuse Virtualmin's statistics collection.

Also, if you click on the "Download raw data" link below the graph, what is displayed?