In my CSS I had this class definition that might have been causing the problem:
.our-price-indicated-pdp-acessories,
.our-price-indicated-cart-dropdown
{
color: #6E6E6E;
font-size: 11px;
line-height: 15px;
font-weight: bold;
text-align: center;
}
So I changed it to:
.our-priceind-pdpa,
.our-priceind-cartdrop{
color: #6E6E6E;
font-size: 11px;
line-height: 15px;
font-weight: bold;
text-align: center;
}
And it worked again.
But it's hard to be absolutely sure. When the name of the class is really long, the error doesn't Always happen. The whole problem is a fantastic mind twist if you ask me.
My advice is, have a look in your CSS and see if you have long class names and try to redeploy the application without those CSS classes.