diff --git a/mvnw b/mvnw
old mode 100644
new mode 100755
diff --git a/src/main/java/team/elrant/bubbles/gui/LoginController.java b/src/main/java/team/elrant/bubbles/gui/LoginController.java
index 35c575f..6b88276 100644
--- a/src/main/java/team/elrant/bubbles/gui/LoginController.java
+++ b/src/main/java/team/elrant/bubbles/gui/LoginController.java
@@ -58,7 +58,7 @@ protected void onSubmitButtonClick() {
     @FXML
     public void initialize() {
         try {
-            User userFromFile = new User("user.dat");
+            User userFromFile = new User("user.dat", "");
             if (!userFromFile.getUsername().isEmpty()) {
                 username_field.setText(userFromFile.getUsername());
             }
diff --git a/src/main/java/team/elrant/bubbles/gui/SideViewApplication.java b/src/main/java/team/elrant/bubbles/gui/SideViewApplication.java
index 57ca47b..5097dd4 100644
--- a/src/main/java/team/elrant/bubbles/gui/SideViewApplication.java
+++ b/src/main/java/team/elrant/bubbles/gui/SideViewApplication.java
@@ -33,11 +33,11 @@ public void start(@NotNull Stage stage) throws Exception {
             AnchorPane root = fxmlLoader.load();
             @NotNull Scene scene = new Scene(root, 320, 720);
             scene.getStylesheets().add(Objects.requireNonNull(getClass().getResource("styling/fluent-light.css")).toExternalForm());
-            primaryStage.setTitle("Chat");
-            primaryStage.setScene(scene);
-            primaryStage.centerOnScreen();
-            primaryStage.setResizable(false);
-            primaryStage.show();
+            stage.setTitle("Chat");
+            stage.setScene(scene);
+            stage.centerOnScreen();
+            stage.setResizable(false);
+            stage.show();
         } catch (Exception e) {
             logger.error("Error starting SideViewApplication: {}", e.getMessage());
             throw e;
diff --git a/src/main/java/team/elrant/bubbles/xmpp/ConnectedUser.java b/src/main/java/team/elrant/bubbles/xmpp/ConnectedUser.java
index b5407c8..63a8453 100644
--- a/src/main/java/team/elrant/bubbles/xmpp/ConnectedUser.java
+++ b/src/main/java/team/elrant/bubbles/xmpp/ConnectedUser.java
@@ -40,7 +40,7 @@ public class ConnectedUser extends User {
      * @param password    The password of the user.
      * @param serviceName The service name of the XMPP server.
      */
-    public ConnectedUser(@NotNull String username, @NotNull String password, @NotNull String serviceName) {
+    public ConnectedUser(@NotNull String username, @NotNull String password, @NotNull String serviceName) throws IOException, ClassNotFoundException {
         super(username, serviceName);
         this.password = password;
     }
@@ -159,7 +159,7 @@ public void saveUserToFile(@NotNull String filename, boolean savePassword) {
             }
 
             logger.info("User information (excluding password) saved to {}", filename);
-        } catch (IOException e) {
+        } catch (IOException | ClassNotFoundException e) {
             logger.error("Error saving user information to file: {}", e.getMessage());
         }
     }