Access denied is normal. You don't want to look at it anyhow because it is probably 5 MBs big. You only want to know what was fixed or not fixed. Here is what you do:
Open another elevated Command Prompt and paste this command into it:
findstr /c:"[SR]" %windir%\logs\cbs\cbs.log
This will show all the files you want to see in the Command Prompt window.
Since that window is not very practical for a detailed study, you want to paste the content into a Notepad, Wordpad or Word file.
For that you right click on the Command Prompt window (any place is good) and click Select All. Then you right click anywhere in the window again. Now this whole text is stored on the clipboard and you can paste it into a document file (e.g. Notepad) where you can analyze it or post it here.