Skaffold apply fails: <manifest.yaml> is not a valid Kubernetes manifest

Is there a way to bypass validation when doing a `skaffold apply`?
`Skaffold deploy` works but doing a skaffold render then apply fails here with terse message.

### Expected behavior
skaffold apply deploys the manifest.yaml
### Actual behavior
` is not a valid Kubernetes manifest` error
### Information

- Skaffold version: v2.0.3 and v1.39.1
- Operating system: Ubuntu 20.04.2 LTS
- Installed via: curl
- Contents of skaffold.yaml:

```yaml
apiVersion: skaffold/v2beta29
kind: Config
deploy:
helm:
releases:
- name: clouddeploy-email
namespace: tt-email
remoteChart: oci://path/to/chart
#repo: my-repo
version: 2.2.6
valuesFiles:
- ./environments/common.yaml
- ./environments/dev/dev.yaml
flags:
upgrade:
- --install
```