W3 validation error

Hi,

I am your new customer (amazing work – I was searching for Header/Footer builder but you have much, much more there) and I am trying to implement it my theme which will sold on ThemeForest. But I can not use your plugin if there are any W3 validation errors.

For example, I am using your plugin here – https://demo.cocobasic.com/elementor-kit/heru/
and if you check the W3 validation page, there are errors – https://validator.w3.org/nu/?doc=https%3A%2F%2Fdemo.cocobasic.com%2Felementor-kit%2Fheru%2F#l828c12097

If I disable header and footer (in your plugin) – all is fine – there are no errors.
Hope this can be fixed – otherwise, I can not use your plugin.

Thank you for your time.