WooCommerce

Hi,

I have an issue with product variations.
Steps:
1. Attributes are created in Products Tab
2. Then I created a product with Product data – Variable product
3. Then I added previously created attribute
4. Then in the variations tab, I added proper variants for this product – from a select list, so this does not issue with typo.
5. On product size, I see select to the variant selection, but I can select the only first one because for next I’m receiving information:
“Incorrect value for selected variation”

Also, I checked select options and looks fine:
<option value=”m” selected=”selected”>M</option>
<option value=”s”>S</option>
<option value=”xs”>XS</option>

Do you have any idea what can be wrong?
Thanks a lot.