Why can't I create new custom objects?

Environment:

Custom Objects, Oracle B2C Service, All versions

Issue:

After opening the Object Designer, selecting a package and clicking on New, the Object option is grayed out. No error or warning message is displayed, but a new custom object cannot be created.

I cannot create additional Custom Objects.

OR:

The Create New Object button is grayed out.

Resolution:

Each Custom Object Package is limited to a maximum of 25 objects. This is hard-coded & cannot be adjusted.  See documentation for further information.

You can create a new package by clicking New > Package. Select the newly created package and after clicking New, the Object option will be active and you will be able to create a new custom object.

OR

In the case of Menu Only Objects you will not be able to modify the Custom Objects after they are created. These are read-only.