At the bottom of the Options page of Wordfence are 3 links to:
Click to test connectivity to the Wordfence API servers
Click to view your system's configuration in a new window
Test your WordPress host's available memory
None of these links work while I am running Cloudflare. Instead I get a Cloudflare page stating:
The page you are looking for cannot be found.
But If I disable cloudflare I am able to run these tests.