CSS file doesnot link with python SDK Example Python-webserver

Hello, 

i tried out the python example of the python-webserver 

and well if you see it works correclty. I can write values in the data layer. So when i looked in the mark down file there is a picture with the stylesheet.css but in my case he doesn't want to link the css file included in /www/stylesheet.css.

i looked further in the code and copied the html file in a notepad. Then i created a file folder to my desktop i linked the stylsheet to the notepad data like this:

When i execute the html file in notepad it puts following results: 

I also changed some default values in the stylesheet.css to see if the linking is correct. 

So when i build the snap for the ctrlx Core Device I only get the first picture without the stylsheet.css linking. 

I got the python example webserver+datalayer from the sdk vers. 1.14.3. 

best regards 

UDK_developer