The error is about a directory that already exists and is not empty, so make sure that you really are cloning to a new folder.
However, by looking at the folder I think the folder may simply be too long.
I use C:\Mendix to place my Mendix projects in. So each Mendix app in its own folder under C:\Mendix
Also, when cloning the app you could leave out the ' (Elektronik Anlaufmanagement)' part in your local folder name. You can change that, it is not part of the changes you sync to the repo
Another issue with using your profile folder for Mendix projects is that the folder may be synced if you have a roaming profile or your profile data is included in OneDrive sync.
Mendix really does not work well under these conditions. Your work gets committed to a repository, your local clone should not be included in some cloud sync or backup tool.
I can't tell whether that is the case in your setup but I have seen many issues coming from using a folder in your Windows profile for Mendix apps