o login esta a dar erro

app/src/main/java/com/example/cuida/CuidaApplication.java

@@ -0,0 +1,19 @@
+package com.example.cuida;
+
+import android.app.Application;
+import com.google.firebase.firestore.FirebaseFirestore;
+import com.google.firebase.firestore.FirebaseFirestoreSettings;
+
+public class CuidaApplication extends Application {
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        
+        // Ativar persistência offline globalmente para toda a aplicação
+        FirebaseFirestore db = FirebaseFirestore.getInstance();
+        FirebaseFirestoreSettings settings = new FirebaseFirestoreSettings.Builder()
+                .setPersistenceEnabled(true)
+                .build();
+        db.setFirestoreSettings(settings);
+    }
+}