Bandwidth not displayed on i3blocks

Hi, I’ve switched from Xfce to i3 and set up the whole wm but can’t get bandwidth script running,
It displays the Wifi symbol and 0/0 MB/s, but it doesn’t change. A little help will be appreciated.

No need to duplicate this, there is a pot already

OH! sorry it was displaying in megabytes but my network wasn’t reaching that so it never updated.
I’ve changed the unit to KB/s and now all good.