Hi @vaibhavtyagee , @dejanzajc123 ,

Although not sure exactly the cause of the issue in your case but I have ran into same issue recently in my case I was able to find this message in the logs:

main.INFO: Broken reference: the 'catalog.product.edit.tab.grouped.container' element cannot be added as child to 'product_tabs', because the latter doesn't exist [] []

The reason in my case was: simple that I was adding in group has custom-option added, once removing that custom option resolved my issue completely.

You may also check if that is the reason.

Please check.

if issue solved,Click Kudos & Accept as Solution