Title: W3C problems Last modified: August 31, 2016 --- # W3C problems * [Marco](https://wordpress.org/support/users/mcivita/) * (@mcivita) * [9 years, 10 months ago](https://wordpress.org/support/topic/w3c-problems/) * Hi, i found a w3c problems on the validation of this link: [http://www.liceotassosalerno.gov.it/liceo/](http://www.liceotassosalerno.gov.it/liceo/) * it’s related to ARPosts plugin. How to fix? * Warning: Article lacks heading. Consider using h2-h6 elements to add identifying headings to all articles. From line 480, column 29; to line 480, column 124 ontainer”>
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