Cloud function error in 0.13.4

Log file: Docker Error: WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store

TL;DR

Cloud functions scheduled in version 0.13.4 are not executing. To fix this, remove and re-add the schedule for the function. There is no log available for scheduled cloud functions, but this is not a problem. Make sure the dotenv variable is set. There is no shortcut for upgrading versions. It is recommended to upgrade to the latest version. The error message about password storage in Docker can be ignored. Creating a new function also throws the same error. There is no specific solution provided for this issue.

I tried to create new function too. It throws same error. How to solve this problem or any hint ? And it didn't triggered after I update to 0.13.4