Update _base.scss

_sass/_base.scss

@@ -12,7 +12,7 @@ section#why,section#portfolio {
     color: white;
 }
 .donatebg {
-    background: url(/img/bg-pattern.png), linear-gradient(to left, #df691a, #ff2300);
+    background: url(..img/bg-pattern.png), linear-gradient(to left, #df691a, #ff2300);
 }
 /* End custom CSS */
 
@@ -174,11 +174,11 @@ header {
   width: 100%;
   min-height: auto;
   overflow-y: hidden;
-  background: url("img/bg-pattern.png"), $head-primary;
+  background: url("..img/bg-pattern.png"), $head-primary;
   /* fallback for old browsers */
-  background: url("img/bg-pattern.png"), -webkit-linear-gradient(to left, $head-primary, $head-secondary);
+  background: url("..img/bg-pattern.png"), -webkit-linear-gradient(to left, $head-primary, $head-secondary);
   /* Chrome 10-25, Safari 5.1-6 */
-  background: url("img/bg-pattern.png"), linear-gradient(to left, $head-primary, $head-secondary);
+  background: url("..img/bg-pattern.png"), linear-gradient(to left, $head-primary, $head-secondary);
   /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
   color: white;
   .header-content {