HTML is not valid

[mbuechner]

See https://validator.w3.org/nu/?doc=https%3A%2F%2Fcodingdavinci.de%2F 😞

[ikyriazi]

Thanks for the hint, Michael! I don't see an urgent validation error for the moment, however I will come back to this issue.

[mbuechner]

Attribute hreflang not allowed on element li at this point.

• Drupal-Issue: https://www.drupal.org/project/drupal/issues/2454289

The article role is unnecessary for element article.

• Drupal-Issue: https://www.drupal.org/project/drupal/issues/3117230

The frameborder/ allowtransparency attribute on the iframe element is obsolete.

• https://www.drupal.org/project/drupal/issues/3071446

[mbuechner]

I tried to fix some issues, too.

• a303275
• 1a9cdfb