Can't Get Custom Font to Work

Hi, i cant get the Mundane font to show up in my list of fonts - anyone know why?

//--- Your Custom Font ---//
@font-face{ 
font-family: 'Novecento+WideDemiBold';
src: url(https://static1.squarespace.com/static/664e1258c3427a4235551f38/t/664e184ba507f6728c3e5a14/1716394059719/Novecento+WideDemiBold.otf);

}
//--- Your Custom Font ---//
@font-face{ 
font-family: 'Mundane-Con Neu';
 src: url(https://static1.squarespace.com/static/664e2b41272ffc75375ddc90/t/6658b978e1e2af17e2fc11cf/1717090680866/Mundane-Con Neu.otf);
}

h1, h2, h3, h4, h5 {
  font-family:'Mundane-Con Neu' !important;
}

When I download and try and open this font file, I get an error, so that may well be the problem:

https://static1.squarespace.com/static/664e2b41272ffc75375ddc90/t/6658b978e1e2af17e2fc11cf/1717090680866/Mundane-Con Neu.otf

There also seems to be a space before Neu.otf which also isn't right for a URL.

Thanks, i have downloaded it again and it seems to work. I have changed it so no space but still doesn't work. I have uploaded a different font and that all works perfectly so i'm finding this really confusing.

//--- Your Custom Font ---//
@font-face{ 
font-family: 'Mundane-Con+Neu';
src: 
url(https://static1.squarespace.com/static/664e2b41272ffc75375ddc90/t/6658b978e1e2af17e2fc11cf/1717090680866/Mundane-Con+Neu.otf);
}

Thanks so much - i'm a fool! You both have helped me and it's all working now!