heroku - Why does setting debug to false in django settings stop app from loading in devlopment and production? -

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in settings have set debug=false instead generated 500 error in both dev , production. looked around , came across (setting debug = false causes 500 error) , tried out.

allowed_hosts = ['www.heroku.com']

but did not work, not doing right? hosting heroku

your app not hosted on www.heroku.com. instead, try

allowed_hosts = [".herokuapp.com"]

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