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I am trying to add a group to an attribute set from admin panel, but it is not getting saved. But without adding any group name it is getting saved. When ever adding new group name and saving I am getting this error:

Exception message: Warning: Invalid argument supplied for foreach() in \magento\vendor\magento\module-catalog\Model\Indexer\Product\Eav\Plugin\AttributeSet\IndexableAttributeFilter.php on line 40

Please find the image:

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