2020-12-10 You may need to update application code to resolve this error.

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You may need to update application code to resolve this error.
Or, you can disable collectstatic for this application:
$ heroku config:set DISABLE_COLLECTSTATIC=1
...

lupa nambahkan Static root

jangan mendisable atau menghilangkan log error seperti ini

$ heroku config:set DISABLE_COLLECTSTATIC=1

karena hanya akan menghilangkan pesan error saja

Referensi:

1. https://stackoverflow.com/questions/36665889/collectstatic-error-while-deploying-django-app-to-heroku

2. https://docs.djangoproject.com/id/3.1/howto/static-files/

solusi:

tambahkan variabel STATIC_ROOT pada settings.py

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')