While connecting existing db to new Magento installation, "There has been an error processing your request occurs!"... Follow the below link to solve.
In vendor/magento/module-configurable-product/Ui/DataProvider/Product/Form/Modifier/ConfigurablePrice.php look for the following code:
$meta[$groupCode]['children'][self::CODE_GROUP_PRICE] = array_replace_recursive(
$meta[$groupCode]['children'][self::CODE_GROUP_PRICE],
[
'children' => [
self::$advancedPricingButton => [
'arguments' => [
'data' => [
'config' => $visibilityConfig,
],
],
],
],
]
);
And replace the following line:
'config' => $visibilityConfig,
With:
'config' => ['componentType'=>'container',$visibilityConfig],