TL;DR now it’s working, but it seems it fixed itself.
I tried npm i yn and received:
npm ERR! Error: EACCES: permission denied, open ‘/app/node_modules/@slack/events-api/node_modules/@types/debug/npm-shrinkwrap.json’
- I enabled pnpm (I found a similar post in the forums).
My service seemed running but my bot couldn’t contact with the service.
I refreshed again and my service was up but I started getting permission errors in runtime.
And then it fixed itself.
I would aprreciate understanding the reason for first error, I had no changes in my code.