Fix #12034

Signed-off-by: soupette <cyril@strapi.io>

packages/core/email/admin/src/pages/Settings/utils/api.js

@@ -1,4 +1,4 @@
-import { axiosInstance } from '../../../../../../admin/admin/src/core/utils';
+import axiosInstance from '../../../utils/axiosInstance';
 
 const fetchEmailSettings = async () => {
   const { data } = await axiosInstance.get('/email/settings');

packages/core/email/admin/src/utils/axiosInstance.js

@@ -0,0 +1,36 @@
+import axios from 'axios';
+import { auth } from '@strapi/helper-plugin';
+
+const instance = axios.create({
+  baseURL: process.env.STRAPI_ADMIN_BACKEND_URL,
+});
+
+instance.interceptors.request.use(
+  async config => {
+    config.headers = {
+      Authorization: `Bearer ${auth.getToken()}`,
+      Accept: 'application/json',
+      'Content-Type': 'application/json',
+    };
+
+    return config;
+  },
+  error => {
+    Promise.reject(error);
+  }
+);
+
+instance.interceptors.response.use(
+  response => response,
+  error => {
+    // whatever you want to do with the error
+    if (error.response?.status === 401) {
+      auth.clearAppStorage();
+      window.location.reload();
+    }
+
+    throw error;
+  }
+);
+
+export default instance;