Firebase Cloud Functions Shell not executing write operations on realtime database - firebase

Question

Since a few days I am not able to test cloud functions locally anymore, as all write functions are not executed and nothing is returned, consequently the function hangs and eventually stops with a timeout.
Example function:
import { database as dbEvent } from "firebase-functions";
export default dbEvent.ref("/tariffs/removeHistory").onCreate((event: any) => {
console.log("START");
const bikesHistoryRef = event.data.adminRef.parent.parent.child("bikesHistory");
return bikesHistoryRef.set(null).then((res) => console.log("Delete done", res));
});
Result:
firebase > removeBikeHistory("test")
'Successfully invoked function.'
firebase > info: User function triggered, starting execution
info: START
firebase >
firebase > info: Execution took 61023 ms, finished with status: 'timeout'
info: Execution took 49694 ms, finished with status: 'crash'
Any suggestion what is wrong? This happens with all my cloud functions, and when I deploy them it works.
I have tried with:
firebase-admin#5.5.1
firebase-functions#0.7.3
firebase-tools#3.15.4 (-g)
and
firebase-admin#5.6.0
firebase-functions#0.7.5
firebase-tools#3.16.0 (-g)
EDIT:
After enabling logging I get the following errors:
info: 0: onDisconnectEvents
info: p:0: Making a connection attempt
info: p:0: Failed to get token: Error: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "Error fetching access token: invalid_grant (Bad Request)". There are two likely causes: (1) your server time is not properly synced or (2) your certificate key file has been revoked. To solve (1), re-sync the time on your server. To solve (2), make sure the key ID for your key file is still present at https://console.firebase.google.com/iam-admin/serviceaccounts/project. If not, generate a new key file at https://console.firebase.google.com/project/_/settings/serviceaccounts/adminsdk.
p:0: data client disconnected
info: p:0: Trying to reconnect in 1283.8299240003184ms
0: onDisconnectEvents
I have actually seen this error when I installed an older firebase-function/admin version, but thought it got fixed by installing the newer version. How can I fix it?

Answer 1

I found the solution in this bug report:
https://github.com/firebase/firebase-functions/issues/135
I have deleted the following file, now my cloud functions work locally again:
rm ~/.config/gcloud/application_default_credentials.json