SlideshowCK does not work / Error message

Hallo 
Im using Joomla 5.0.3 Stable hosted  at Joomla100 and tried to use SlideshowCK but get get the folowing Error message at the frontend:

Joomla\CMS\Filesystem\Folder::create: Could not create folder.Path: [ROOT]/images/slideshow/Adalbert Kaiser.jpg
Joomla\CMS\Filesystem\Folder::create: Could not create folder.Path: [ROOT]/images/slideshow/Klaus Menner.jpg
.
.
.

any ideas how I can solve this problem?
Thanks in advance for your help

Hi
Please try to go in the advanced options >> auto create thumbs >> set it to NO and tell me
CEd