I saw in the video that talks about how to use CSS and Javascript that we can use the Kendo API Reference.
Then we see that it uses the line of code with config.config in front.
However, on my side when I use the Kendo Reference for a signature on a photo that looks like this
image006.png
And add the reference like this:
image007.png
It does not work and the image does not appear and the signature section remains unchanged like this:
image008.png
Thanks for your help.

Try using ' instead of " and see if it works? Aware usually has issues with " in advanced script options.

PS: I don't know if the code snippet you are using is correct so can possibly also be the reason.