The performance metrics (CPU, RAM, etc.) come from the server "Performance.log" files which reside in the same folder as the Sessions, Events, and Audit logs. Given that you are getting information for "Sessions" and "Events" (the server error) I'd say that you have pointed to the correct server log folder.
What does the Scan Results tab look like? Does it show scan errors? How many Performance logs does it say it read?
Also, is it possible that you are pointing to the same folder for both Server log files and also "documents"? In other words, is the server log folder a sub-folder within the "Documents to Scan" folder?
Thank you for your reply.
I do get some scan errors, but these are errors because some of the folders it is scanning are empty.
As you can see on the second screenshot, it only loads one performance log file.
That seems to be correct though, as far as I can tell there is only one performance log file in the stated logpath.
This is my current configuration page: