Icons not working i Chrome and Firefox

I’ve noticed that the circle icons and icons in buttons doesn’t show up when using chrome or firefox with my website www.medianaut.dk . Instead its just little squares (chrome) or squares with code in it (firefox). I’ve tried on two different computers. Safari works fine. And chrome on iphone works too.
I have set both the wordpress-adress and the website address to the same, and i have redirected medianaut.dk to www.medianaut.dk.
Any suggestions to whats wrong?

URL: http://www.medianaut.dk