That camera requires at least Camera Raw 8.2. It is my understanding that Photoshop Elements 12 ships with Camera Raw 8.1. Go to the help menu in Photoshop Elements, and I believe there is an updates option. Click on that and you should be updated to a newer version of Camera Raw.
Yes, PSE12 can be updated all the way to ACR 8.5, but ships with ACR 8.1, so you will need to update with Help / Updates in the Editor.
If you just purchased PSE12 you should know that PSE13 came out this past Tuesday and you’re probably eligible for a free upgrade depending on how long ago you purchased PSE12.
On the weekend I’m not sure where you send you, but you might try going to the purchase pages and wait for a minute or two, to see if you get an automatic chat popup and tell them your situation including when you purchased PSE12 and see if they’ll give you a free upgrade to PSE13.
By purchases pages I mean here:
Or maybe here: