My custom font is not shown on all pages/titles as it should. Please help :)

Site URL: https://fwww.augustsegerholm.com

My custom font is not shown on all pages/titles as it should. 

See attached file. This is not the custom font

Here is the code:

//--FOR START PAGE---

/* BRANDING -- Text
  -------------------------*/
  [data-compound-type="logo"][data-slice-type="heading"] h1{
    font-family:"MonumentExtended-Regular" !important;
  }
  
  /* BRANDING -- Heading
  ----------------------------*/
  [data-slice-type="heading"]:not([data-compound-type]) h1 {
    font-family:"MonumentExtended-Regular" !important;
  }
  
  /* BRANDING -- Paragraph/Body
  ----------------------------------*/
  [data-slice-type="body"] p{
    font-family:"MonumentExtended-Regular" !important;
  }
  
  /*BRANDING -- Navigation
  ----------------------------*/
  .button-style-outline [data-slice-type="buttons"] a{
    font-family:"MonumentExtended-Regular" !important;
  }
  
  @font-face
  {
  font-family: 'MonumentExtended-Regular';
  src:url('https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e78ea543cea1837b6cedf71/1584982613709/MonumentExtended-Regular.otf');
}

//--FOR THE SITE OVERALL---

//--Font for headlines---
@font-face {    
  font-family: 'MONUMENTEXTENDED-REGULAR'; 
src: url('https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e78ea543cea1837b6cedf71/1584982613709/MonumentExtended-Regular.otf');  
}
//ASSIGN MONUMENTEXTENDED-REGULAR FONT//
h1 {font-family:"MonumentExtended-Regular";}

h2 {font-family:"MonumentExtended-Regular";}

h3 {font-family:"MonumentExtended-Regular";}

//--For site titles pages--
@font-face{
   font-family: 'MONUMENTEXTENDED-REGULAR'; 
  src:url('https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e78ea543cea1837b6cedf71/1584982613709/MonumentExtended-Regular.otf');
}
#site-title {font-family: 'MONUMENTEXTENDED-REGULAR'; 
 src:url('https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e78ea543cea1837b6cedf71/1584982613709/MonumentExtended-Regular.otf');
}

//Custom cursor--//
.collection-type-gallery.enable-gallery-thumbnails .overlay-controls.center-control {
                               cursor: url(https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e8c8d4e14e7393e38514a75/1586269518925/dry-clean.png), ns-resize;
}
.collection-type-gallery .overlay-controls.left-control {
                               cursor: url(https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e8c8d4e14e7393e38514a75/1586269518925/dry-clean.png), e-resize;
}
.collection-type-gallery .overlay-controls.right-control {
                               cursor: url(https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e8cf2f6f1e18465f530b621/1586295569777/LOADING_BAR_small.gif), w-resize;
}

//Custom Font Navigation--
.Header-nav--primary .Header-nav-item
{font-family:"MonumentExtended-Regular";}

//FONT UPLOAD--//
@font-face
  {
  font-family: 'MonumentExtended-Regular';
  src:url('https://static1.squarespace.com/static/50b797d6e4b0079225dee6c0/t/5e78ea543cea1837b6cedf71/1584982613709/MonumentExtended-Regular.otf');
}

Hopefully someone skilled can help me with this!

Hi,

Can you check site url? It doesn't work