loader not found for file extension

[sweepies]

When trying to load config files, I'm getting this errors like this:

loader not found for file extension '..yml'

Here's the code in question:

package configuration

import (
	goConfig "github.com/pcelvng/go-config"
	"github.com/rs/zerolog/log"
)

// Config is the main config type
type Config struct {
	S3                  S3Configuration `env:"S3" flag:"s3" validate:"required"`
	PublicFetchURL      string          `env:"PUBLIC_FETCH_URL" flag:"url" help:"The URL to fetch from instead of using the S3 API" validate:"omitempty,url"`
	SetPublicACL        bool            `env:"SET_PUBLIC_ACL" flag:"acl" help:"Whether or not to set a public read ACL on objects" validate:"omitempty"`
	DefaultCacheControl string          `env:"CACHE_CONTROL" flag:"cache" help:"Cache-Control string to use" validate:"required"`
}

// S3Configuration is the S3 config type
type S3Configuration struct {
	Endpoint string `env:"ENDPOINT" flag:"endpoint" help:"The S3 endpoint e.g. s3.amazonaws.com" validate:"required,fqdn"`
	Region   string `env:"REGION" flag:"region" help:"The S3 region e.g. us-east-1" validate:"required"`
	Bucket   string `env:"BUCKET" flag:"bucket" help:"The S3 bucket" validate:"required"`
}

// Configure loads the application configuration
func Configure() Config {
	config := Config{
		S3: S3Configuration{
			Endpoint: "s3.amazonaws.com",
			Region:   "us-east-1",
		},
		SetPublicACL:        false,
		DefaultCacheControl: "public, max-age=31536000",
	}

	if err := goConfig.Load(&config); err != nil {
		log.Fatal().Err(err).Msg("Error loading config")
	}

	return config
}

And the command: