Using PowerShell it's rather easy to find information list. In messages about denied access (especially in custom SharePoint solutions) you can see in URL ID of denided list.

To find-out where it is you can using this script: 

Get-SPSite https://site_url/mysite |Get-SPWeb -Limit ALL | %{$_.Lists} | ?{$_.ID -eq "3F472F51-EF18-4320-AB2A-C5BE45253E88"} | ft Title, ParentWebURL, RootFolder