change PyappApplication to PyApplication

pyapp/ui/server/app.py

@@ -66,7 +66,7 @@ def run_application():
 
     if app_cls is None:
         Log.error(
-            f"No class annotated with @PyappApplication found with the name '{app_name}'.",
+            f"No class annotated with @PyApplication found with the name '{app_name}'.",
             True,
         )
         return jsonify(
@@ -78,7 +78,7 @@ def run_application():
 
     if not hasattr(app_cls, "start"):
         Log.error(
-            "The class annotated with @PyappApplication should have a 'start' method.",
+            "The class annotated with @PyApplication should have a 'start' method.",
             True,
         )
         return jsonify(