Heroku Error: Cannot find module 'm3u8stream/lib/parse-time'

[ghost]

Hi guys. I am new to npm and node js. I made a discord bot and I deployed it to Heroku by using GitHub. I checked all settings in Heroku. I typed 'node bot.js' but it says 'Error: Cannot find module 'm3u8stream/lib/parse-time'. Then I opened the console, opened bash, and typed 'cp -r ./node_modules/m3u8stream/dist ./node_modules/m3u8stream/lib'. Then I typed 'node bot.js'. The bot is online and it worked perfectly. I don't know is this a bug or whatever. I've got the package.json file here:
packagejson.txt
Hope someone can help me.