@Mike94,
Upon looking at your site I noticed this while viewing the style.css file (wp-content/themes/mima/style.css?ver=325):
@font-face {
font-family: Proxima;
src: url(../fonts/ProximaNova-Regular.otf);
}
Thus, what is being asked for is wp-content/themes/mima/../fonts/ProximaNova-Regular.otf (which does not exist); however, I did find the font file by removing the ../ from the src.
However, on viewing your site, I also encountered another issue:
Redirect at origin 'http://www.misiamariina.sk' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://misiamariina.sk' is therefore not allowed access. misiamariina.sk/:1
This message showed in Chrome. It appears that http://www.misiamariina.sk is redirected to http://misiamariina.sk, but all of your resources advertise themselves at the www. address. Your http server has apparently denied access to at least one file (which I believe to be the font file in question), and so your CORS policy restricts you from automatically downloading this resource. How you address this depends on your environment: