Application error for the ML model i deployed from Heroku - at=error code=H10 desc="App crashed" method=GET path="/favicon.ico"

[SubramanianRaghu]

I have deployed a ML model in Heroku. But i am getting application error (https://moviereviewpredictor-api.herokuapp.com/).

I am getting the below error "error code=H10 desc="App crashed" method=GET path="/favicon.ico" from the logs

Can any one suggest a solution please?

PFB logs

2020-10-07T12:26:44.965820+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
2020-10-07T12:26:44.965820+00:00 app[web.1]: import(module)
2020-10-07T12:26:44.965821+00:00 app[web.1]: File "/app/app.py", line 6, in
2020-10-07T12:26:44.965821+00:00 app[web.1]: cv = pickle.load(open('cv-transform.pkl','rb'))
2020-10-07T12:26:44.965973+00:00 app[web.1]: _pickle.UnpicklingError: invalid load key, 'v'.
2020-10-07T12:26:44.966974+00:00 app[web.1]: [2020-10-07 12:26:44 +0000] [10] [INFO] Worker exiting (pid: 10)
2020-10-07T12:26:44.968097+00:00 app[web.1]: [2020-10-07 12:26:44 +0000] [11] [ERROR] Exception in worker process
2020-10-07T12:26:44.968097+00:00 app[web.1]: Traceback (most recent call last):
2020-10-07T12:26:44.968103+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
2020-10-07T12:26:44.968104+00:00 app[web.1]: worker.init_process()
2020-10-07T12:26:44.968104+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
2020-10-07T12:26:44.968105+00:00 app[web.1]: self.load_wsgi()
2020-10-07T12:26:44.968105+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
2020-10-07T12:26:44.968105+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2020-10-07T12:26:44.968106+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
2020-10-07T12:26:44.968106+00:00 app[web.1]: self.callable = self.load()
2020-10-07T12:26:44.968106+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
2020-10-07T12:26:44.968107+00:00 app[web.1]: return self.load_wsgiapp()
2020-10-07T12:26:44.968107+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2020-10-07T12:26:44.968108+00:00 app[web.1]: return util.import_app(self.app_uri)
2020-10-07T12:26:44.968109+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
2020-10-07T12:26:44.968109+00:00 app[web.1]: import(module)
2020-10-07T12:26:44.968109+00:00 app[web.1]: File "/app/app.py", line 6, in
2020-10-07T12:26:44.968110+00:00 app[web.1]: cv = pickle.load(open('cv-transform.pkl','rb'))
2020-10-07T12:26:44.968138+00:00 app[web.1]: _pickle.UnpicklingError: invalid load key, 'v'.
2020-10-07T12:26:44.969165+00:00 app[web.1]: [2020-10-07 12:26:44 +0000] [11] [INFO] Worker exiting (pid: 11)
2020-10-07T12:26:45.208555+00:00 app[web.1]: [2020-10-07 12:26:45 +0000] [4] [INFO] Shutting down: Master
2020-10-07T12:26:45.208697+00:00 app[web.1]: [2020-10-07 12:26:45 +0000] [4] [INFO] Reason: Worker failed to boot.
2020-10-07T12:26:45.307837+00:00 heroku[web.1]: Process exited with status 3
2020-10-07T12:26:45.354311+00:00 heroku[web.1]: State changed from up to crashed
2020-10-07T12:28:46.135580+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=moviereviewpredictor-api.herokuapp.com request_id=4256a79c-b3cc-4fb7-844c-13b3432a3ddd fwd="103.84.178.237" dyno= connect= service= status=503 bytes= protocol=https
2020-10-07T12:28:46.593413+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=moviereviewpredictor-api.herokuapp.com request_id=18450366-b781-48af-9ffe-6e8cc0db3660 fwd="103.84.178.237" dyno= connect= service= status=503 bytes= protocol=https
2020-10-07T12:35:58.007464+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=moviereviewpredictor-api.herokuapp.com request_id=4306d705-482d-4d82-b20a-6aa04571ca3c fwd="103.84.178.237" dyno= connect= service= status=503 bytes= protocol=https
2020-10-07T12:35:58.588196+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=moviereviewpredictor-api.herokuapp.com request_id=dfadc329-4443-4ad3-921f-1d81c8cb7580 fwd="103.84.178.237" dyno= connect= service= status=503 bytes= protocol=https