Report a Problem Link is not working

[niccokunzmann]

What do I see?

Footer: report a problem does link to
https://github.com/CoderDojoPotsdam/intro/blob/master//intro/issues/new

How did I get there

Website link: http://material.quelltext.eu/potsdam.html

What would I like to see instead:

https://github.com/CoderDojoPotsdam/intro/issues/new

I would suggest this solution: