Trigger: cannot find yaml

I use helm chart deploy drone in kubernetes. And config it use local gitlab.
Auth, sync repo is ok. I create a drone demo project, but it can’t trigger build. I am sure there is a .drone.yml file in project root. This is drone server log:

WARN[13892] trigger: cannot find yaml commit=dd74c60c4e5d6439e6cc77ac9606183cf50e8156 error= event=push ref=refs/heads/master

The error is empty, I don’t know why failed.

Thanks for any help!

We’re experiencing a similar issue. It seems it’s due to Drone not having access to our GitHub repo for some reason.