Welcome to the forum @brendan
Viewing the log files of a backup job is usually the right place to look for warning information, and usually there’s a popup message offering to show it to you – even if error is actually in the server log you’re in…
Are you getting any popup warnings? The notifications are dismissable. Logs are logs. They’re a record. Please look through backup job logs to see which ones logged warnings. This is highlighted with yelllow.
EDIT:
Interface blocked by hundreds of old warnings, “Dismiss all” does not work is what yellow warnings look like (when you have way too many). Popup notifications should be individually or all-at-once dismissable.
Below is what the backup log (not the server) log looked like after I induced some warnings (see yellow):
