I updated my firebase-functions and now I get this error in the firebase console. The code is still the same but I get an error now:
/srv/node_modules/@google
You can also get this error if you are running node v8. Upgrading to node v10 resolves this error.
If you are managing your node version using nvm, then run:
nvm install v10 --lts
I think it is a better solution then downgrading firebase-admin library.
Downgrade firebase-admin and firebase-functions to version: "firebase-admin": "^8.10.0", "firebase-functions": "^3.6.1" and it will work.
Thanks to Marcel Hoekstra for posting this in the comments.