Undo unintended SL changes.

services/web/public/stylesheets/app/error-pages.less

@@ -81,10 +81,9 @@
 		.error-btn when (@is-overleaf = false) {
 			color: @navbar-default-link-color;
 			border: 2px solid @navbar-default-link-color;
-			border-radius: @navbar-btn-border-radius;
-			font-size: @navbar-btn-font-size;
-			font-weight: @navbar-btn-font-weight;
-			line-height: @navbar-btn-line-height;
+			border-radius: @border-radius-base;
+			font-weight: 700;
+			line-height: 1;
 			padding: @padding-base-vertical @padding-base-horizontal;
 
 			&:hover,