Fix Request error case

js/utils/requests.js

@@ -13,11 +13,17 @@ class Requests {
     unpackResponse(response) {
         if (response.status >= 500) {
             let err = new Error(response.status + ' - ' + response.statusText + ' - on URL:' + response.url);
-            response
+
+            return response
                 .text()
-                .then((resText) => JSON.parse(resText))
+                .then((resText) => {
-                .then((resJSON) => {
+                    const resJson = JSON.parse(resText);
-                    err = new Error(resJSON.errors.pop());
+                    err = new Error(resJson.errors.pop());
+
+                    // ES6 promises don't have a .finally() clause so
+                    // we fake that here by forcing the .catch() clause
+                    // to run
+                    return Promise.reject();
                 })
                 .catch(() => { throw err; });
         }
@@ -57,9 +63,7 @@ class Requests {
                             resolve({});
                         }
                     }
-                }).catch((err) => {
+                }).catch(reject);
-                    reject(err);
-                });
             });
     }