diff --git a/front/src/Connexion/ConnectionManager.ts b/front/src/Connexion/ConnectionManager.ts
index 0fea50b5..615f75b9 100644
--- a/front/src/Connexion/ConnectionManager.ts
+++ b/front/src/Connexion/ConnectionManager.ts
@@ -53,7 +53,7 @@ class ConnectionManager {
                 return Promise.reject('Could not find a user in localstorage');
             }
         }
-        return Promise.reject('ConnexionManager initialization failed');
+        return Promise.reject('ConnexionManager initialization failed: invalid URL');
     }
 
     public initBenchmark(): void {
diff --git a/front/src/Phaser/Game/GameManager.ts b/front/src/Phaser/Game/GameManager.ts
index 10277e20..bed098ae 100644
--- a/front/src/Phaser/Game/GameManager.ts
+++ b/front/src/Phaser/Game/GameManager.ts
@@ -1,6 +1,7 @@
 import {GameScene} from "./GameScene";
 import {connectionManager} from "../../Connexion/ConnectionManager";
 import {Room} from "../../Connexion/Room";
+import {FourOFourSceneName} from "../Reconnecting/FourOFourScene";
 
 export interface HasMovedEvent {
     direction: string;
@@ -14,10 +15,16 @@ export class GameManager {
     private characterLayers!: string[];
     private startRoom!:Room;
     private sceneManager!: Phaser.Scenes.SceneManager;
-    
+
     public async init(sceneManager: Phaser.Scenes.SceneManager) {
         this.sceneManager = sceneManager;
-        this.startRoom = await connectionManager.initGameConnexion();
+        try {
+            this.startRoom = await connectionManager.initGameConnexion();
+        } catch (e) {
+            this.sceneManager.start(FourOFourSceneName, {
+                url: window.location.pathname.toString()
+            });
+        }
         this.loadMap(this.startRoom.url, this.startRoom.ID);
     }
 
@@ -40,8 +47,8 @@ export class GameManager {
     getCharacterSelected(): string[] {
         return this.characterLayers;
     }
-    
-     
+
+
     public loadMap(mapUrl: string, roomID: string): void {
         console.log('Loading map '+roomID+' at url '+mapUrl);
         const gameIndex = this.sceneManager.getIndex(roomID);
@@ -57,7 +64,7 @@ export class GameManager {
         const endPos = mapUrlStart.indexOf(".json");
         return mapUrlStart.substring(startPos, endPos);
     }
-    
+
     public async goToStartingMap() {
         this.sceneManager.start(this.startRoom.ID, {startLayerName: 'global'});
     }
diff --git a/front/src/Phaser/Reconnecting/FourOFourScene.ts b/front/src/Phaser/Reconnecting/FourOFourScene.ts
index 0c91a5bc..3e84b7e9 100644
--- a/front/src/Phaser/Reconnecting/FourOFourScene.ts
+++ b/front/src/Phaser/Reconnecting/FourOFourScene.ts
@@ -15,7 +15,8 @@ export class FourOFourScene extends Phaser.Scene {
     private fileNameField!: Text;
     private logo!: Image;
     private cat!: Sprite;
-    private file!: string;
+    private file: string|undefined;
+    private url: string|undefined;
 
     constructor() {
         super({
@@ -23,8 +24,9 @@ export class FourOFourScene extends Phaser.Scene {
         });
     }
 
-    init({ file }: { file: string }) {
+    init({ file, url }: { file?: string, url?: string }) {
         this.file = file;
+        this.url = url;
     }
 
     preload() {
@@ -45,11 +47,22 @@ export class FourOFourScene extends Phaser.Scene {
         this.mapNotFoundField = new TextField(this, this.game.renderer.width / 2, this.game.renderer.height / 2, "404 - File not found");
         this.mapNotFoundField.setOrigin(0.5, 0.5).setCenterAlign();
 
-        this.couldNotFindField = new TextField(this, this.game.renderer.width / 2, this.game.renderer.height / 2 + 24, "Could not load file");
+        let text: string = '';
+        if (this.file !== undefined) {
+            text = "Could not load map"
+        }
+        if (this.url !== undefined) {
+            text = "Invalid URL"
+        }
+
+        this.couldNotFindField = new TextField(this, this.game.renderer.width / 2, this.game.renderer.height / 2 + 24, text);
         this.couldNotFindField.setOrigin(0.5, 0.5).setCenterAlign();
 
-        this.fileNameField = this.add.text(this.game.renderer.width / 2, this.game.renderer.height / 2 + 38, this.file, { fontFamily: 'Georgia, "Goudy Bookletter 1911", Times, serif', fontSize: '10px' });
-        this.fileNameField.setOrigin(0.5, 0.5);
+        const url = this.file ? this.file : this.url;
+        if (url !== undefined) {
+            this.fileNameField = this.add.text(this.game.renderer.width / 2, this.game.renderer.height / 2 + 38, url, { fontFamily: 'Georgia, "Goudy Bookletter 1911", Times, serif', fontSize: '10px' });
+            this.fileNameField.setOrigin(0.5, 0.5);
+        }
 
         this.cat = this.physics.add.sprite(this.game.renderer.width / 2, this.game.renderer.height / 2 - 32, 'cat', 6);
         this.cat.flipY=true;
diff --git a/front/src/Url/UrlManager.ts b/front/src/Url/UrlManager.ts
index 39f5667d..876e258e 100644
--- a/front/src/Url/UrlManager.ts
+++ b/front/src/Url/UrlManager.ts
@@ -16,7 +16,7 @@ class UrlManager {
             return GameConnexionTypes.anonymous;
         } else if (url.indexOf('@/') > -1) {
             return GameConnexionTypes.organization;
-        } else if(url.indexOf('register/')) {
+        } else if(url.indexOf('register/') > -1) {
             return GameConnexionTypes.register
         } else {
             return GameConnexionTypes.unknown