You are running an application in a virtual machine (VM) using a custom Debian image with the Stackdriver Logging agent installed. The VM has the cloud-platform scope, and the application logs information via syslog. You want to visualize these logs in the Google Cloud Platform Console using Stackdriver Logging, but syslog entries are not appearing in the "All logs" dropdown of the Logs Viewer. What is the first step you should take to resolve this issue?