Hello @Aveeva
It's a recursive function so you can change your code like below :
protected function mergeMetadataElement(array $bundleComponents, $name, array $data, $reverseMerge = false)
{
if (isset($bundleComponents[$name])) {
$bundleComponents[$name] = $reverseMerge
? array_replace_recursive($data, $bundleComponents[$name])
: array_replace_recursive($bundleComponents[$name], $data);
return [$bundleComponents, true];
} else {
foreach ($bundleComponents as &$childData) {
if (isset($childData['attributes']['class'])
&& is_a($childData['attributes']['class'], \Magento\Ui\Component\Container::class, true)
&& isset($childData['children']) && is_array($childData['children'])
) {
if(!isset($data)){
echo $name." <====== NAME";
exit;
}
list($childData['children'], $isMerged) = $this->mergeMetadataElement(
$childData['children'],
$name,
$data,
$reverseMerge
);
if ($isMerged) {
return [$bundleComponents, true];
}
}
}
}
return [$bundleComponents, false];
}It will throw you the name of element for which data is missing.
Hope it helps !
Depends on the process you were doing to generate that error, do same process.
No need to run any command, changing in same file doesn't require it, just flush the cache and try.