problem with variable products with woo 3.0.4

Link to product page?

Here is a link to the variable product:
https://clean-trade.ru/product/flanudery/
Yet there is an obscure inscription, when I choose any variation : (Этот товар недоступен. Пожалуйста, выберите другую комбинацию.) This product is not available. Please select another combination.

The weird thing is that the price range on variable product displayed on the website and on the product erased all the variations after updating woocommerce from version 3.0.1 to version 3.0.4

Your variations have no price: https://dl.dropboxusercontent.com/s/hajmshyb2q521qx/2017-04-24%20at%2013.39.png

301.47 Р – 553.73 Р – that’s the price on the page it is displayed. I use an additional plugin that will convert the currency of one country for the currency of another country.

The problem which appeared after upgrading from version 3.0.1 to version 3.0.4
а) The main problem is that for example:
1. I added a color attribute
2. To the attribute added variations (blue, green, red)
3. Add a new item, put that item will vary
4. Pass in the attributes choose the color
5. Put a check to use for variation
6. And then there is a problem I can’t add variation (blue, green, red), which I have previously defined for this attribute.

b) The second problem after upgrade
1. Erased all the variations

Doesn’t matter that the parent has the range; variations NEED a regular_price set or they are unavailable. You are missing this data.

> b) The second problem after upgrade
> 1. Erased all the variations

There was a bug in 3.0.0 which could trash variations. This no longer occurs.