'Procfile declared none

I am trying to deploy to Heroku. I keep getting an application error. I created a ProcFile file without any extension, but Heroku doesn't seem to recognize it.



Solution 1:[1]

The problem was solved by changing the ProcFile file to Procfile and there was more than one requirements.txt file It has been erased and create one requirements.txt file for all downloaded

Solution 2:[2]

You're correct that the file doesn't have an extension, but it needs to be called Procfile, exactly. Your file is called ProcFile with a capital F.

Rename it to Procfile, commit, and redeploy.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 danaelshrbiny
Solution 2 Chris