Cannot find module. heroku. What to do?

Question

Node.js

I launched a telegram bot on node.js on heroku.
It gives the following error in the logs: Error: Cannot find module 'node-telegram-bot-api'.
The same with all other modules.
package.json looks like this:
{
"name": "telega-bot2000",
"version": "1.0.0",
"description": "A sample Node.js app using Express 4",
"main": "index. js",
"scripts": {
"start": "node index.js"
},
"engines": {
"node": "8.9.1"
},
"repository": {
"type": "git",
" url": "
"heroku",
"express"
],
"author": "goganoid",
"contributors": [
"goganoid"
],
"license": "MIT"
}
I'm also wondering if the procfile web bot will work?