After changing the size of the product and refreshing the page, we faced an error in your module: 


When foreach, in the array $map2[$map[$code]] there is an element that does not contain a $value index, leading to the undefined index error. So, you need to check the isset before assigning the value. 

To resolve the issue, please perform some changes in the following file: 


modified line 139 from: 

"$superAttribute[$map[$code]] = $map2[$map[$code]][$value];"


"if (isset($map2[$map[$code]][$value])) {

 $superAttribute[$map[$code]] = $map2[$map[$code]][$value];


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