Azure App Service (Flask): ModuleNotFoundError: No module named 'run'

Question

Hey,
I'm currently working on my college project and tried deploying my Flask application to Azure App Service. However, I keep running into an error that no module named 'run' (the startup file is run.py in the root folder).
The root directory contains the requirements.txt file as well as run.py.
I am using Github Actions as the build provider. The build completes successfully, i.e. all the modules are being downloaded correctly, but the deployment fails.

I use the following startup command:

   gunicorn --bind=0.0.0.0 --timeout 600 run:app  

Complete logs:

   2021-05-18T12:53:22.997524952Z   
   2021-05-18T12:53:22.997560752Z   _____                                 
   2021-05-18T12:53:22.997567552Z   /  _  \ __________ _________   ____    
   2021-05-18T12:53:22.997581752Z  /  /_\  \___   /  |  \_  __ \_/ __ \   
   2021-05-18T12:53:22.997587552Z /    |    \/    /|  |  /|  | \/\  ___/   
   2021-05-18T12:53:22.997592052Z \____|__  /_____ \____/ |__|    \___  >  
   2021-05-18T12:53:22.997596452Z         \/      \/                  \/   
   2021-05-18T12:53:22.997600652Z   
   2021-05-18T12:53:22.997604452Z A P P   S E R V I C E   O N   L I N U X  
   2021-05-18T12:53:22.997608552Z   
   2021-05-18T12:53:22.997612252Z Documentation: http://aka.ms/webapp-linux  
   2021-05-18T12:53:22.997616252Z Python 3.7.9  
   2021-05-18T12:53:22.997620052Z Note: Any data outside '/home' is not persisted  
   2021-05-18T12:53:23.205563707Z Starting OpenBSD Secure Shell server: sshd.  
   2021-05-18T12:53:23.283939727Z Site's appCommandLine: gunicorn --bind=0.0.0.0 --timeout 600 run:app  
   2021-05-18T12:53:23.285423428Z Launching oryx with: create-script -appPath /home/site/wwwroot -output /opt/startup/startup.sh -virtualEnvName antenv -defaultApp /opt/defaultsite -bindPort 8000 -userStartupCommand 'gunicorn --bind=0.0.0.0 --timeout 600 run:app'  
   2021-05-18T12:53:23.336032241Z Cound not find build manifest file at '/home/site/wwwroot/oryx-manifest.toml'  
   2021-05-18T12:53:23.339104742Z Could not find operation ID in manifest. Generating an operation id...  
   2021-05-18T12:53:23.339214842Z Build Operation ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx  
   2021-05-18T12:53:24.163744357Z Oryx Version: 0.2.20210225.2, Commit: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, ReleaseTagName: 20210225.2  
   2021-05-18T12:53:24.638606083Z Writing output script to '/opt/startup/startup.sh'  
   2021-05-18T12:53:25.301612860Z WARNING: Could not find virtual environment directory /home/site/wwwroot/antenv.  
   2021-05-18T12:53:25.302387060Z WARNING: Could not find package directory /home/site/wwwroot/__oryx_packages__.  
   2021-05-18T12:53:26.135877784Z [2021-05-18 12:53:26 +0000] [35] [INFO] Starting gunicorn 20.0.4  
   2021-05-18T12:53:26.135913684Z [2021-05-18 12:53:26 +0000] [35] [INFO] Listening at: http://0.0.0.0:8000 (35)  
   2021-05-18T12:53:26.135919984Z [2021-05-18 12:53:26 +0000] [35] [INFO] Using worker: sync  
   2021-05-18T12:53:26.135924184Z [2021-05-18 12:53:26 +0000] [38] [INFO] Booting worker with pid: 38  
   2021-05-18T12:53:26.135928284Z [2021-05-18 12:53:26 +0000] [38] [ERROR] Exception in worker process  
   2021-05-18T12:53:26.135932284Z Traceback (most recent call last):  
   2021-05-18T12:53:26.135936284Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker  
   2021-05-18T12:53:26.135940484Z     worker.init_process()  
   2021-05-18T12:53:26.135944284Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/workers/base.py", line 119, in init_process  
   2021-05-18T12:53:26.135960884Z     self.load_wsgi()  
   2021-05-18T12:53:26.135965284Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi  
   2021-05-18T12:53:26.135969384Z     self.wsgi = self.app.wsgi()  
   2021-05-18T12:53:26.135973184Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi  
   2021-05-18T12:53:26.135977084Z     self.callable = self.load()  
   2021-05-18T12:53:26.135980784Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 49, in load  
   2021-05-18T12:53:26.135984784Z     return self.load_wsgiapp()  
   2021-05-18T12:53:26.135988584Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp  
   2021-05-18T12:53:26.135992584Z     return util.import_app(self.app_uri)  
   2021-05-18T12:53:26.135996284Z   File "/opt/python/3.7.9/lib/python3.7/site-packages/gunicorn/util.py", line 358, in import_app  
   2021-05-18T12:53:26.136000284Z     mod = importlib.import_module(module)  
   2021-05-18T12:53:26.136003984Z   File "/opt/python/3.7.9/lib/python3.7/importlib/__init__.py", line 127, in import_module  
   2021-05-18T12:53:26.136007984Z     return _bootstrap._gcd_import(name[level:], package, level)  
   2021-05-18T12:53:26.136012484Z   File "", line 1006, in _gcd_import  
   2021-05-18T12:53:26.136017084Z   File "", line 983, in _find_and_load  
   2021-05-18T12:53:26.136021084Z   File "", line 965, in _find_and_load_unlocked  
   2021-05-18T12:53:26.136025084Z ModuleNotFoundError: No module named 'run'  
   2021-05-18T12:53:26.136029084Z [2021-05-18 12:53:26 +0000] [38] [INFO] Worker exiting (pid: 38)  
   2021-05-18T12:53:26.216758106Z [2021-05-18 12:53:26 +0000] [35] [INFO] Shutting down: Master  
   2021-05-18T12:53:26.217610206Z [2021-05-18 12:53:26 +0000] [35] [INFO] Reason: Worker failed to boot.  

**Project Structure **(Used made-up names of local modules):

   |-- GithubRepo  
        |--- run.py   
        |--- requirements.txt       
        |--- app  
            |--- __init__.py  
            |--- module1.py  
            |--- module2.py  
            |--- templates  
            |--- static  

run.py

   from app import app  

   if __name__ == "__main__":  
       app.run(debug=True)  

__init__.py:

   app = Flask(__name__)  
   cors = CORS(app)  
   app.config['CORS_HEADERS'] = 'Access-Control-Allow-Origin'  

Other important facts about the project:

• App Service Plan Tier: Basic B1 Plan
• Code Source: Github
• Build Provider: Github Actions
• I used Git LFS to upload a 1 GB ML model on GitHub
• SCM_DO_BUILD_DURING_DEPLOYMENT is true

Any help would be appreciated.
Thanks!

EDIT 19-05-2021

Github Workflow .yml file:

   name: Build and deploy Python app to Azure Web App - disaster-response  

   on:  
     push:  
       branches:  
         - runpy  
     workflow_dispatch:  

   jobs:  
     build:  
       runs-on: ubuntu-latest  

       steps:  
       - uses: actions/checkout@v2  

       - name: Set up Python version  
         uses: actions/setup-python@v1  
         with:  
           python-version: '3.7'  

       - name: Create and start virtual environment  
         run: |  
           python -m venv venv  
           source venv/bin/activate  
       - name: Install dependencies  
         run: pip install -r requirements.txt  

       # Optional: Add step to run tests here (PyTest, Django test suites, etc.)  

       - name: Upload artifact for deployment jobs  
         uses: actions/upload-artifact@v2  
         with:  
           name: python-app  
           path: |  
             .  
             !venv/  
     deploy:  
       runs-on: ubuntu-latest  
       needs: build  
       environment:  
         name: 'production'  
         url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}  

       steps:  
         - name: Download artifact from build job  
           uses: actions/download-artifact@v2  
           with:  
             name: python-app  
             path: .  

         - name: 'Deploy to Azure Web App'  
           uses: azure/webapps-deploy@v2  
           with:  
             app-name: 'disaster-response'  
             slot-name: 'production'  
             publish-profile: ${{ secrets.xxxxxxxxxxxxxxx_xxxxxxxxxxxxxx_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx }}  

Kudu Project Structure: