I try to markup a little section in my code as NewsArticle but I can't get it to validate.
If I do this
<div itemscope itemprop="publisher" itemtype="https://schema.org/Organization">
<span itemprop="name">My Company</span>
</div>
the validator complains that there is no logo.
And if I add a logo like this
<div itemscope itemprop="publisher" itemtype="https://schema.org/Organization">
<img itemprop="logo" src="https://www.mysite.de/resources/assets/71/small/my_logo_web.png" />
<span itemprop="name">My Company</span>
</div>
the validator complains that the attribute contains an invalid value. What am I doing wrong here?