Issues on importing functions from model.py

[Benminoungou]

I'm trying to install SWATOnline in my computer. When I want to run this application, I got the error bellow:

ERROR:tethys.app_base:The following error occurred while trying to import the controller function "barrage_bagre.controllers.home":
Traceback (most recent call last):
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\tethys_apps\base\app_base.py", line 76, in _resolve_ref_function
module = import(module_name, fromlist=[function_name])
File "c:\users\minou\tethysdev\tethysapp-barrage_bagre\tethysapp\barrage_bagre\controllers.py", line 6, in
from .model import *
RuntimeError: Model class tethysapp.barrage_bagre.model.Shapefiles doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

ERROR:tethys.tethys_apps.harvester:App tethysapp.barrage_bagre not loaded because of an issue with loading urls:
Traceback (most recent call last):
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\tethys_apps\harvester.py", line 267, in _harvest_app_instances
app_instance.url_patterns
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\tethys_apps\base\app_base.py", line 197, in url_patterns
controller_function = self._resolve_ref_function(url_map.controller, 'controller', is_extension)
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\tethys_apps\base\app_base.py", line 81, in _resolve_ref_function
raise e
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\tethys_apps\base\app_base.py", line 76, in _resolve_ref_function
module = import(module_name, fromlist=[function_name])
File "c:\users\minou\tethysdev\tethysapp-barrage_bagre\tethysapp\barrage_bagre\controllers.py", line 6, in
from .model import *
File "c:\users\minou\tethysdev\tethysapp-barrage_bagre\tethysapp\barrage_bagre\model.py", line 10, in
class Shapefiles(models.Model):
File "C:\Users\minou\Anaconda3\envs\tethys\lib\site-packages\django\db\models\base.py", line 111, in new
"INSTALLED_APPS." % (module, name)
RuntimeError: Model class tethysapp.barrage_bagre.model.Shapefiles doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

I don't where I'm wrong. Could someone help me to solve this problem?
Thank you