Cannot Open/Start/View the app on Heroku #521

When trying to launch the app on Heroku, after Heroku deployment, I get the following error. I tried deploying twice. Same result.
2021-06-28T13:27:53.157676+00:00 app[web.1]:
2021-06-28T13:27:53.157686+00:00 app[web.1]: > primecms-heroku@1.0.0 start /app
2021-06-28T13:27:53.157687+00:00 app[web.1]: > node index.js
2021-06-28T13:27:53.157687+00:00 app[web.1]:
2021-06-28T13:27:56.206955+00:00 heroku[web.1]: Process exited with status 0
2021-06-28T13:27:56.271504+00:00 heroku[web.1]: State changed from starting to crashed
2021-06-28T13:31:18.673259+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=prime-service-cms.herokuapp.com request_id=7238ae9a-04ba-4060-987a-608c67d75a09 fwd="64.228.4.199" dyno= connect= service= status=503 bytes= protocol=https
2021-06-28T13:31:19.115634+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=prime-service-cms.herokuapp.com request_id=c8e5a579-b6a5-4a14-8c71-f99af23dd856 fwd="64.228.4.199" dyno= connect= service= status=503 bytes= protocol=https
2021-06-28T13:31:55.391233+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=prime-service-cms.herokuapp.com request_id=70cc6148-187f-40ca-af62-ab8376f13cf0 fwd="64.228.4.199" dyno= connect= service= status=503 bytes= protocol=https
2021-06-28T13:31:55.688118+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=prime-service-cms.herokuapp.com request_id=e5161740-0eec-4a2f-8ea5-6a600f329bf8 fwd="64.228.4.199" dyno= connect= service= status=503 bytes= protocol=https