Variable Field Groups / Mapping error

Hi,

I use your plugin for a sportive shop.

I want to offer users product packs with variations and also custom flocking (price addition).
It works very well, but there are a lot of variations to create! (tshirt in several sizes, shorts in several sizes, bag and flocking on tshirt, shorts …)
For some time, when I access the page of “mapping” it turns, and after a few minutes, I have the javascript message “[object Object]”.
There is probably too much information to display! Have you ever had this problem? Is there a solution? We spent several hours to enter this mapping, and we would not like to lose everything;)
Thanks