There has been a new installation of Magento 126.96.36.199 to my server. I am trying to create an attribute set and assign attribute to the already "default" set available. However the "Add new set" button is not available and is missing.
Actually it is the exact same problem as this: http://magento.stackexchange.com/questions/29477/add-new-set-button-in-manage-attribute-sets-is-not-...
Have you tried the following:
The issue is because there is template files missing in magento 188.8.131.52 version.
For fixing this issue download complete package of magento 184.108.40.206 version.
Got to “app/design/adminhtml/default/default/template/catalog/product/attribute”
In this directory copy the “set” directory and paste it in magento 220.127.116.11 on same location (app/design/adminhtml/default/default/template/catalog/product/attribute).
Now delete your Magento cache and check the attribute set section in admin, now it will work properly.