raw datei öffnen

The faq about raw versions has not been fully updated.

FAQ: Will Photoshop Elements work with my camera, or Why won't my raw files open?

Your camera raw format requires ACR 10.3 which is only supported in PSE2018 Windows after running the menu Help > Updates or in the current PSE2019.

If you don't want to pay the upgrade, your free solution is to download the free Adobe DNGconverter mentioned in the faq.

That independent software (not a plugin) can batch convert a whole folder of your raw files to the DNG raw format that your current PSE version can read and edit. An additional batch step, but free and with the same quality.