Create a notification process to track Error Log changes in Salesforce Billing

1. Create a new field on the Error Log object with a name like 'Issue Fixed'. This should be a Boolean with the default value False
2. Create a report using the type Error Logs that shows at least the Created Date and Full Error Log fields. Show all error logs with Created Date = All Time. Filter by the field you created in step 1 (Issue Fixed) = False

Subscribe to this report at a cadence that suits your schedule or create a Dashboard to show when there are unaddressed error logs. 

As you fix issues that come up via an error log, edit the Error Log record to set Issue Fixed = True. This takes it off the report and dashboard.