ZapZap by Rafael Tosta Error when try to open the application

Project information: ZapZap by Rafael Tosta

facing error when try to open the zapzap application. error log is given below

Log:
root@server:/home/navadarsan# flatpak run com.rtosta.zapzap
Traceback (most recent call last):
File “/app/lib/python3.11/site-packages/dbus/bus.py”, line 177, in activate_name_owner
return self.get_name_owner(bus_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/bus.py”, line 361, in get_name_owner
return self.call_blocking(BUS_DAEMON_NAME, BUS_DAEMON_PATH,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/connection.py”, line 652, in call_blocking
reply_message = self.send_message_with_reply_and_block(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name ‘org.freedesktop.Notifications’: no such name

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/app/bin/zapzap”, line 8, in
sys.exit(main())
^^^^^^
File “/app/lib/python3.11/site-packages/zapzap/main.py”, line 84, in main
window = MainWindow(app)
^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/zapzap/controllers/main_window.py”, line 34, in init
self.zapHome = Home()
^^^^^^
File “/app/lib/python3.11/site-packages/zapzap/controllers/home.py”, line 41, in init
self.loadUsers()
File “/app/lib/python3.11/site-packages/zapzap/controllers/home.py”, line 87, in loadUsers
button = UserContainer(self, user)
^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/zapzap/controllers/user_container.py”, line 61, in init
self.browser = Browser(user.id, self)
^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/zapzap/engine/browser.py”, line 23, in init
dbus.init(appname)
File “/app/lib/python3.11/site-packages/zapzap/services/dbus_notify.py”, line 53, in init
proxy = bus.get_object(name, path)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/bus.py”, line 241, in get_object
return self.ProxyObjectClass(self, bus_name, object_path,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/proxies.py”, line 250, in init
self._named_service = conn.activate_name_owner(bus_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/bus.py”, line 182, in activate_name_owner
self.start_service_by_name(bus_name)
File “/app/lib/python3.11/site-packages/dbus/bus.py”, line 277, in start_service_by_name
return (True, self.call_blocking(BUS_DAEMON_NAME, BUS_DAEMON_PATH,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/app/lib/python3.11/site-packages/dbus/connection.py”, line 652, in call_blocking
reply_message = self.send_message_with_reply_and_block(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Fontconfig error: Cannot load config file “/run/host/font-dirs.xml”: No such file: /run/host/font-dirs.xml