What version of Photoshop do you have? You need Camera Raw 9.5 or higher for that camera, so you need Photoshop CC to use that version of camera raw. if you don't have PS CC, you need to download the free dng converter.
You need minimum Camera raw 9.5 version plugin to use the raw data from Canon EOS-80D
Please let us know the Adobe application you are using to access the raw files.
The initial post clearly says Photoshop Elements 13 in English, amidst the German.
The answer is you need at least PSE14 update to the last compatible ACR plug-in which is 9.5.
Personally, I'd wait for PSE15 to be released in a few weeks, if the past is any guide, and while waiting, I'd use the DNG Converter which is free to make DNGs out of the CR2s, and then those DNGs, but not the CR2s, will open in the older PSE13 ACR plug-in.