And so with all my sites on generatepress. I thought only from me, but I look, and on yours too. But it was never like that. Before buying generatepress, I checked including your site-there were always 0 errors in the code. All this appeared after the appearance of wp 4.9 really believe me, I always check the purity of the code. please pay attention to this.
And it’s still on your and my sites enabled autoptimize plugin. Then only 5-6 errors in the validator. And if you turn off this plugin, then almost 20 errors.