There are a few things you can do to help save an object in Photoshop. The first is to make sure that the object is properly named. If the object is unnamed, Photoshop will not know how to save it and will give you an error message. To name an object, click on the name of the object in the Object panel and then click on the Save button. Another thing you can do is to make sure that Photoshop knows how to save objects with different file types. If an object has a file type other than Photoshop’s default, such as GIF or PNG, then Photoshop will not be able to save it and will give you an error message. To save an object with a different file type, click on the File Type button in the Object panel and then select the desired file type.
