diff --git a/frontend/app/api_middleware.js b/frontend/app/api_middleware.js
index 783ebe8c3..1846a9dbc 100644
--- a/frontend/app/api_middleware.js
+++ b/frontend/app/api_middleware.js
@@ -2,27 +2,27 @@ import logger from 'App/logger';
 import APIClient from './api_client';
 import { UPDATE, DELETE } from './duck/jwt';
 
-export default store => next => (action) => {
+export default (store) => (next) => (action) => {
   const { types, call, ...rest } = action;
   if (!call) {
     return next(action);
   }
-  const [ REQUEST, SUCCESS, FAILURE ] = types;
+  const [REQUEST, SUCCESS, FAILURE] = types;
   next({ ...rest, type: REQUEST });
   const client = new APIClient();
 
   return call(client)
-    .then(async response => {
+    .then(async (response) => {
       if (response.status === 403) {
         next({ type: DELETE });
       }
       if (!response.ok) {
-        const text = await response.text()
+        const text = await response.text();
         return Promise.reject(text);
       }
-      return response.json()
+      return response.json();
     })
-    .then(json => json || {}) // TEMP  TODO on server: no empty responces
+    .then((json) => json || {}) // TEMP  TODO on server: no empty responces
     .then(({ jwt, errors, data }) => {
       if (errors) {
         next({ type: FAILURE, errors, data });
@@ -34,14 +34,22 @@ export default store => next => (action) => {
       }
     })
     .catch((e) => {
-      logger.error("Error during API request. ", e)
-      return next({ type: FAILURE, errors: JSON.parse(e).errors || [] });
+      logger.error('Error during API request. ', e);
+      return next({ type: FAILURE, errors: parseError(e) });
     });
 };
 
+function parseError(e) {
+  try {
+    return JSON.parse(e).errors || [];
+  } catch {
+    return e;
+  }
+}
+
 function jwtExpired(token) {
   try {
-    const base64Url = token.split('.')[ 1 ];
+    const base64Url = token.split('.')[1];
     const base64 = base64Url.replace('-', '+').replace('_', '/');
     const tokenObj = JSON.parse(window.atob(base64));
     return tokenObj.exp * 1000 < Date.now(); // exp in Unix time (sec)