Rev Slider Update

Hi The new Update from the RevSlider 5.2.5 to 5.2.5.4 doesn´t work install no problem but a liitle Problem is there.
All rights given to the folders but:
**could not unzip revslider/public/assets/svg/svg.zip into the **
**uploads/revslider/assets/svg/ folder, please make sure that the uploads **
folders is writable

Some have one Idea?

LG