Allows to start / stop now, but it's not populating the page with anything other than 2 "broken pictures". (let it sit for awhile). the appdata does have *something* in the various interfaces (docker, etc) there. Beyond that, you might want to consider silencing this from being logged:
Oct 7 18:02:10 ServerA vnstatd[25705]: Traffic rate for "vnet1" higher than set maximum 10 Mbit (30->42, r0 t117), syncing.
With a line logged every 30seconds, the log will fairly quickly fill up.