{{ argument.0 }} is returning empty

[rzel]

validation_schema = {
    title: 'required|min:3|max:80',
    price: 'required|float',
}

const validation_error_messages = {
        required: '{{ field }} cannot be empty',
        min: '{{ field }} must be at least {{ argument.0 }} characters', 
        max: '{{ field }} cannot be more than {{ argument.0 }} characters', 
    }

Is returning "title must be at least characters" or "title cannot be more than characters" when validation is run. The {{ argument.0 }} part isn't showing up.