Errors when trying to deploy to Kubeless with serverless-kubeless

When deploying a simple “hello world” service the following response is returned from Serverless: Serverless: Unable to find any running pod for hello. Retrying...
This continues until it times out looking for it.

Interestingly the kubeless controller manager outputs the following error:

time="2021-06-02T00:40:54Z" level=error msg="Error processing kubeless/hello (giving up): Deployment.apps \"hello\" is invalid: spec.template.spec.containers[0].image: Required value" pkg=function-controller

ERROR: logging before flag.Parse: E0602 00:40:54.927898       1 function_controller.go:185] Deployment.apps "hello" is invalid: spec.template.spec.containers[0].image: Required value

I’m not really sure what to make of it.