Convert-ingress error

Hello there!
I’m using istioctl 1.5.1 through microk8s and I have a really weird error when trying to use convert-ingress function.
While executing:
microk8s istioctl convert-ingress -f ./app/ingress.yaml
This is what it returns:
Error: 1 error occurred:
* unsuported kind: Ingress

What am I missing?