I'm trying to running the appserver with python manage.py runserver with python 3.8.2 and django 3.0.3. I've setup a mysql database connection and inserted my "myApp.apps.myAppConfig" into INSTALLED_APPS, declared a couple of database-view based models, a form and a view. Nothing that seems too out of the way for the tutorials i've found. When i run the python manage.py runserver command, this is the output:

Watching for file changes with StatReloader Performing system
  checks...
Exception in thread django-main-thread: Traceback (most recent call
  last):   File
  "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\apps\registry.py",
  line 155, in get_app_config
      return self.app_configs[app_label] KeyError: 'admin'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):   File
  "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\threading.py",
  line 932, in _bootstrap_inner
      self.run()   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\threading.py",
  line 870, in run
      self._target(*self._args, **self._kwargs)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\autoreload.py",
  line 53, in wrapper
      fn(*args, **kwargs)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\commands\runserver.py",
  line 117, in inner_run
      self.check(display_num_errors=True)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\base.py",
  line 392, in check
      all_issues = self._run_checks(   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\base.py",
  line 382, in _run_checks
      return checks.run_checks(**kwargs)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\registry.py",
  line 72, in run_checks
      new_errors = check(app_configs=app_configs)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\urls.py",
  line 13, in check_url_config
      return check_resolver(resolver)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\urls.py",
  line 23, in check_resolver
      return check_method()   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py",
  line 407, in check
      for pattern in self.url_patterns:   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py",
  line 48, in get
      res = instance.dict[self.name] = self.func(instance)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py",
  line 588, in url_patterns
      patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)   File
  "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py",
  line 48, in get
      res = instance.dict[self.name] = self.func(instance)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py",
  line 581, in urlconf_module
      return import_module(self.urlconf_name)   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\importlib__init__.py",
  line 127, in import_module
      return _bootstrap._gcd_import(name[level:], package, level)   File "", line 1014, in _gcd_import   File
  "", line 991, in _find_and_load   File
  "", line 975, in _find_and_load_unlocked 
  File "", line 671, in _load_unlocked
  File "", line 783, in
  exec_module   File "", line 219, in
  _call_with_frames_removed   File "C:\Users\celli\Desktop\Interventi Comuni\Python\django-projects\zabbixPyFace\zabbixPyFace\urls.py", line
  21, in 
      path('admin/', admin.site.urls),   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py",
  line 224, in inner
      self._setup()   File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\contrib\admin\sites.py",
  line 537, in _setup
      AdminSiteClass = import_string(apps.get_app_config('admin').default_site)   File
  "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\apps\registry.py",
  line 162, in get_app_config
      raise LookupError(message) LookupError: No installed app with label 'admin'.

I tried searching big G for answers but there's many sources that can cause this problem, could any of you gurus provide some insight?
Update:
I've already checked the INSTALLED_APPS and django.contrib.admin is present: 
INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', # jupyter notebook plugin 'django_extensions', ]
You need to add "django.contrib.admin" to your INSTALLED_APPS setting.
Django LookupError: No installed app with label 'admin'