diff --git a/public/assets/helpers/log.js b/public/assets/helpers/log.js
index 1d0bf526..4f2038c7 100644
--- a/public/assets/helpers/log.js
+++ b/public/assets/helpers/log.js
@@ -1,4 +1,5 @@
 import { toHref } from "../lib/skeleton/router.js";
+import ajax from "../lib/ajax.js";
 
 export function report(msg, err, link, lineNo, columnNo) {
     if (window.navigator.onLine === false) return Promise.resolve();
@@ -10,5 +11,5 @@ export function report(msg, err, link, lineNo, columnNo) {
     url += "from.columnNo=" + columnNo;
     if (err instanceof Error) url += "error=" + encodeURIComponent(err.message) + "&";
 
-    return fetch(url, { method: "post" }).catch(() => {});
+    return ajax({ url, method: "post" }).toPromise().catch(() => {});
 }
diff --git a/public/assets/locales/index.js b/public/assets/locales/index.js
index 51717f41..960073e6 100644
--- a/public/assets/locales/index.js
+++ b/public/assets/locales/index.js
@@ -1,4 +1,5 @@
-import rxjs, { ajax } from "../lib/rx.js";
+import rxjs from "../lib/rx.js";
+import ajax from "../lib/ajax.js";
 
 let LNG = {};
 
@@ -42,11 +43,10 @@ export async function init() {
     }
     return ajax({
         url: "assets/locales/" + selectedLanguage + ".json",
-        responseType: "json",
     }).pipe(rxjs.tap(({ responseHeaders, response }) => {
         const contentType = responseHeaders["content-type"].trim();
         if (contentType === "application/json") {
-            LNG = response;
+            LNG = JSON.parse(response);
             return;
         }
         throw new Error(`wrong content type '${contentType}'`);
diff --git a/public/assets/pages/viewerpage/application_table.js b/public/assets/pages/viewerpage/application_table.js
index 8253ab13..4931c131 100644
--- a/public/assets/pages/viewerpage/application_table.js
+++ b/public/assets/pages/viewerpage/application_table.js
@@ -19,7 +19,7 @@ class ITable {
     getBody() { throw new Error("NOT_IMPLEMENTED"); }
 }
 
-export default async function(render, { mime, getDownloadUrl = nop, getFilename = nop, hasMenubar = true, acl$ }) {
+export default async function(render, { mime, getDownloadUrl = nop, getFilename = nop, hasMenubar = true, acl$ = rxjs.EMPTY }) {
     const $page = createElement(`
         <div class="component_tableviewer">
             <component-menubar filename="${getFilename()}" class="${!hasMenubar && "hidden"}"></component-menubar>
diff --git a/server/routes.go b/server/routes.go
index d24845a8..25552f5a 100644
--- a/server/routes.go
+++ b/server/routes.go
@@ -103,8 +103,8 @@ func Build(r *mux.Router, a App) {
 	}
 
 	// Other endpoints
-	middlewares = []Middleware{ApiHeaders, PluginInjector}
-	r.HandleFunc(WithBase("/report"), NewMiddlewareChain(ReportHandler, middlewares, a)).Methods("POST")
+	middlewares = []Middleware{ApiHeaders, PluginInjector, PublicCORS}
+	r.HandleFunc(WithBase("/report"), NewMiddlewareChain(ReportHandler, middlewares, a)).Methods("POST", "OPTIONS")
 	middlewares = []Middleware{IndexHeaders, SecureHeaders, PluginInjector}
 	r.HandleFunc(WithBase("/about"), NewMiddlewareChain(AboutHandler, middlewares, a)).Methods("GET")
 	r.HandleFunc(WithBase("/robots.txt"), NewMiddlewareChain(RobotsHandler, []Middleware{}, a))