Gauge chart doesn't show the value arc

[andreiP4]

Describe the bug
Gauge chart doesn't show the value arc in an Angular application, although it shows the correct value label. I have uninstalled other npm packages that I thought might have influenced it, but the issue persists. Upon inspecting the CSS, the value arc div is not there, unlike in the stackblitz demo:

Official Stackblitz demo:

My CSS:

To Reproduce
Steps to reproduce the behavior:

• using "@coreui/angular": "^5.2.2" and "@swimlane/ngx-charts": "^20.5.0"

Expected behavior
My chart's value arc should be visible and coloured in the colour I selected (#5AA454)

Demo
Couldn't create a stackblitz because of some dependency errors. Might try again if really needed.

ngx-charts version
20.5.0 = latest

Additional context
I also have a problem related to the line chart data points line and tooltip not showing, but I'm not sure if those two are related.