Product Combination display error on the front end

[larrson]

Using Prestashop 1.7.6.5,  classic theme

 

Hello,

Each Attribute defined in the back office (Product / Combination / Attribute) and added as a combination, should appear on the store frontend product page above the add to cart button.
For example: Size, Color, Material. And a dropdown menu should allow the client to choose one of the values. For example: Red, 40, Nylon.
However, only the first attribute is displayed correctly. The following are displayed, but without the values and do not allow any choice.

The problem does not come from the attributes, since if we change their place, the Color attribute will be displayed correctly.
And the attribute that previously worked well in the first place is no longer displayed.
Is this a bug? Or i miss something (i would prefer).

How to fix it ? Any ideas ? Thank you

[larrson]

Thank you Ndiaga.
Got the solution.

All the  combinations have to been generated at once. You can not edit them (if you want more than one attribute), and you cannot just add another attribute.
This is for presta 1.7.6.5.  For other 1.7 versions, there seems to be no solution.
Time to get that bug fixed for good.