[Help] WEB FERRAREZI WEBSHOP- Problem to GenerateSocketBonus

Hi guys! Morning!
Well I faced a problem this morning after to add some Socket items to sell at webshop, the problem is that buy some items with inserted seed calls an error message.
Sounds like some missing function or like that, could someone please help me to rings a bell about this error???

Below error message presented in website, and after source code in that line...
Please, someone ;x

*Error happens after to buy a socket item with seed socket inserted without repeat

https://i.imgur.com/koJfoUO.png

EDIT: Just realized that called function GenerateBonusSocket cannot be found in class file, and makes me realize that function is missing in my web files.
Please, someone could check this function in your web files to help me to obtain this function?
I'll be glad to that