Camera Raw: HDR doesn't work with more than 5 pictures anymore after Update

I just did Photoshop and Bridge Update on Windows 10 Pro. Camera Raw was updated automatically also.

Now HDR in Camera Raw doesn't work anymore with more than 5 pictures.

So when I'm choosing more than 5 pictures in Camera Raw and I do "Zu HDR zusammenfügen..." (Alt+M), an error-window appears:

Fehler: "Der Vorgang konnte nicht abgeschlossen werden"

The same behaviour is with "Zu HDR-Panorama zusammenfügen...". The same error appears when choosing to do a HDR from more than 5 pictures.

It worked perfectly before the update. I change to older versions of photshop and Bridge but the bug still stayed.

It already deinstalled all Adobe Applications completely and I also did the AdobeCreativeCloudCleanerTool. But the error still appears.

Is this a bug in the software? Thank you for your support.