To get tree (child categories) need to use method \AdobeStock\Api\Client\SearchCategory::getCategoryTree
This method has next lines:
if ($request->getCategoryId() == null) { throw StockApiException::withMessage('Category Id cannot be null'); }
But categories of top level have parentId == 0. And exception thrown in this case
It could be fixed if use strict compare with null
if ($request->getCategoryId() === null) { throw StockApiException::withMessage('Category Id cannot be null'); }
Issue report
To get tree (child categories) need to use method \AdobeStock\Api\Client\SearchCategory::getCategoryTree This method has next lines:
if ($request->getCategoryId() == null) { throw StockApiException::withMessage('Category Id cannot be null'); }
But categories of top level have parentId == 0. And exception thrown in this case
It could be fixed if use strict compare with null
if ($request->getCategoryId() === null) { throw StockApiException::withMessage('Category Id cannot be null'); }