Notice: Undefined offset: 0 in /var/app/current/app/code/Magento/ConfigurableProduct/Model/Product/Type/VariationMatrix.php on line 47
1 Answer
Check below solution.
app/code/Magento/ConfigurableProduct/Model/Product/Type/VariationMatrix.php
Removed this line: $filledVariation[$currentAttribute['id']] = $currentAttribute['values'][$currentVariationValue];
added this new line: if(isset($currentAttribute['id']) && $currentAttribute['id']) {